{"title":"Titanium Blade","description":"\u003cdiv class=\"container\"\u003e\n\u003cdiv class=\"markdown markdown-main-panel md-content enable-luminous-fast-follows enable-updated-hr-color stronger\" id=\"model-response-message-contentr_32ff85ad230229af\" aria-busy=\"false\" aria-live=\"polite\" dir=\"ltr\"\u003e\n\u003cp data-path-to-node=\"0\"\u003e\u003ca href=\"https:\/\/edcmall.cn\/collections\/titanium-blade\"\u003e\u003cb data-path-to-node=\"0\" data-index-in-node=\"0\"\u003eTitanium\u003c\/b\u003e\u003c\/a\u003e\u003cspan\u003e\u003ca href=\"https:\/\/edcmall.cn\/collections\/titanium-blade\"\u003e \u003c\/a\u003e(typically utilized as an alloy such as Ti-6Al-4V) is a specialized,\u003c\/span\u003e\u003cspan\u003e non-ferrous blade material celebrated for total corrosion immunity against saltwater,\u003c\/span\u003e\u003cspan\u003e an outstanding strength-to-weight ratio,\u003c\/span\u003e\u003cspan\u003e and non-magnetic properties.\u003c\/span\u003e\u003cspan\u003e It exhibits remarkable structural ductility and fracture toughness without the risk of rusting.\u003c\/span\u003e\u003cspan\u003e However,\u003c\/span\u003e\u003cspan\u003e unlike traditional cutlery steels,\u003c\/span\u003e\u003cspan\u003e titanium suffers from low base hardness and an inherent lack of wear-resistant carbides,\u003c\/span\u003e\u003cspan\u003e resulting in inferior edge retention.\u003c\/span\u003e\u003cspan\u003e The cutting apex dulls rapidly under abrasive contact unless surface-carbidized,\u003c\/span\u003e\u003cspan\u003e making it ideal for specialized dive utility rather than sustained slicing tasks.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!----\u003e\u003c!----\u003e\n\u003c\/div\u003e","products":[{"product_id":"trivisa-firefly-ultra-st-yd04-st-t","title":"Trivisa Firefly Ultra-ST YD04-ST-T Titanium Blade Titanium Handle Crossbar Lock Folding Knife","description":"\u003cp\u003eThe TRIVISA Firefly Ultra-ST YD04-ST-T is a lightweight folding knife designed for everyday carry and outdoor adventures. Its 2.99-inch titanium blade features a bead-blasted finish and a distinctive swedge profile, while the titanium handle creates a clean, cohesive look. A crossbar lock secures the blade during use, and ceramic ball bearings support smooth opening. Measuring 6.69 inches overall and 3.7 inches when closed, the knife weighs just 2.79 ounces for convenient carry. The blade is 0.13 inches thick and has a stated hardness of 53±2 HRC. Designed by the TRIVISA team, the Firefly Ultra-ST is suited to a range of activities, including hiking, camping, fishing, hunting, and everyday carry.\u003c\/p\u003e\n\u003ch2 class=\"h3\"\u003e\n\u003cstrong\u003eTitanium\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBlade Introduction\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"container\"\u003e\n\u003cdiv class=\"markdown markdown-main-panel md-content enable-luminous-fast-follows enable-updated-hr-color stronger\" id=\"model-response-message-contentr_32ff85ad230229af\" aria-busy=\"false\" aria-live=\"polite\" dir=\"ltr\"\u003e\n\u003cp data-path-to-node=\"0\"\u003e\u003ca href=\"https:\/\/edcmall.cn\/collections\/titanium-blade\"\u003e\u003cb data-path-to-node=\"0\" data-index-in-node=\"0\"\u003eTitanium\u003c\/b\u003e\u003c\/a\u003e\u003cspan\u003e\u003ca href=\"https:\/\/edcmall.cn\/collections\/titanium-blade\"\u003e \u003c\/a\u003e(typically utilized as an alloy such as Ti-6Al-4V) is a specialized,\u003c\/span\u003e\u003cspan\u003e non-ferrous blade material celebrated for total corrosion immunity against saltwater,\u003c\/span\u003e\u003cspan\u003e an outstanding strength-to-weight ratio,\u003c\/span\u003e\u003cspan\u003e and non-magnetic properties.\u003c\/span\u003e\u003cspan\u003e It exhibits remarkable structural ductility and fracture toughness without the risk of rusting.\u003c\/span\u003e\u003cspan\u003e However,\u003c\/span\u003e\u003cspan\u003e unlike traditional cutlery steels,\u003c\/span\u003e\u003cspan\u003e titanium suffers from low base hardness and an inherent lack of wear-resistant carbides,\u003c\/span\u003e\u003cspan\u003e resulting in inferior edge retention.\u003c\/span\u003e\u003cspan\u003e The cutting apex dulls rapidly under abrasive contact unless surface-carbidized,\u003c\/span\u003e\u003cspan\u003e making it ideal for specialized dive utility rather than sustained slicing tasks.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!----\u003e\u003c!----\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"MsoNormal\"\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003cp\u003eDesigner:TRIVISA Team\u003cbr\u003eStyle:Swedge\u003cbr\u003eBlade Material: Titanium Blade\u003cbr\u003eBlade Finished: Bead Blast Finished\u003cbr\u003eHandle Material:Titanium Handle\u003cbr\u003eLock Style:Crossbar Lock\u003cbr\u003eHardness:53±2HRC\u003cbr\u003eBearing:Ceramic Ball Bearing\u003c\/p\u003e\n\u003cp\u003eSize:\u003cbr\u003eOverall length-6.69\"(171mm)\u003cbr\u003eBlade length-2.99\"(76mm)\u003cbr\u003eClosed length-3.7\"(95mm)\u003cbr\u003eBlade width-0.9''(23mm)\u003cbr\u003eBlade thickness-0.13''(3mm)\u003cbr\u003eNet Weight:2.79oz(79.2g)\u003c\/p\u003e\n\u003cp\u003eUsage:Outdoor survival,EDC,hunting,fishing, hiking and camping\u003c\/p\u003e\n\u003ch2\u003eTrivisa Firefly Ultra-ST - Bead Blast Titanium Blade in an All-Titanium Crossbar-Lock Frame\u003c\/h2\u003e\n\u003cp\u003eThe Trivisa Firefly Ultra-ST pairs a bead-blast solid titanium blade with a titanium handle on a \u003ca href=\"\/collections\/crossbar-lock-knives\"\u003ecrossbar lock\u003c\/a\u003e and ceramic bearings at 79.2 g (2.79 oz) - a folder that cannot rust. More \u003ca href=\"\/collections\/folding-knives\"\u003efolding knives\u003c\/a\u003e and \u003ca href=\"\/collections\/edc-all-products\"\u003eEDC gear\u003c\/a\u003e at EDCMALL.\u003c\/p\u003e\n\u003ch2\u003eA Solid Ti-6Al-4V Blade: What Titanium Really Buys You\u003c\/h2\u003e\n\u003cp\u003eThe Firefly Ultra-ST is the rare production folder whose blade is forged from solid Ti-6Al-4V aerospace titanium - not steel with a coating. Titanium cannot rust, ever: sweat, rain, salt spray and week-long boat trips leave it exactly as it came. It is non-magnetic for EOD and marine work, and the whole knife rides at just 79.2 g on 3.0 mm blade stock. The honest trade, stated plainly: at 53+\/-2 HRC with no carbides, the edge dulls faster than any knife steel - this is a corrosion-proof, collector-grade, watersports folder, not a cardboard slicer. Compare Ti-6Al-4V with \u003ca href=\"\/collections\/m390\"\u003eM390\u003c\/a\u003e, \u003ca href=\"\/collections\/cpm-s35vn\"\u003eCPM-S35VN\u003c\/a\u003e and \u003ca href=\"\/collections\/14c28n\"\u003e14C28N\u003c\/a\u003e in the table below and buy it for the right reasons.\u003c\/p\u003e\n\u003ch2\u003eWhy the Trivisa Firefly Ultra-ST Belongs in Your Kit\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e2.99 inch (76 mm) solid Ti-6Al-4V titanium blade at 53+\/-2 HRC on 3.0 mm stock.\u003c\/li\u003e\n\u003cli\u003eBead blast finish - uniform matte texture that kills glare and hides wear.\u003c\/li\u003e\n\u003cli\u003eSwedged spine that sharpens tip geometry and lightens the profile.\u003c\/li\u003e\n\u003cli\u003eGrey titanium handle with orange anodized accents - rust-free top to bottom.\u003c\/li\u003e\n\u003cli\u003eCrossbar lock: ambidextrous, dirt-tolerant and finger-safe on closing.\u003c\/li\u003e\n\u003cli\u003eCeramic ball bearing pivot with thumb stud for smooth one-hand opening.\u003c\/li\u003e\n\u003cli\u003e79.2 g (2.79 oz) on a 6.69 inch frame - disappears in the pocket.\u003c\/li\u003e\n\u003cli\u003eNon-magnetic and saltwater-proof: a genuine marine and watersports EDC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBest Uses for the Firefly Ultra-ST\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSaltwater fishing and boating where a steel blade would pit and stain within days.\u003c\/li\u003e\n\u003cli\u003ePaddle, surf and beach carry where everything gets soaked and sandy.\u003c\/li\u003e\n\u003cli\u003eEOD-adjacent and lab duty where a non-magnetic tool is required.\u003c\/li\u003e\n\u003cli\u003eCollection display for one of the few all-titanium production folders on the market.\u003c\/li\u003e\n\u003cli\u003eEveryday carry in humid climates for buyers who are simply done with rust spots.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs the blade really titanium, not coated steel?\u003c\/strong\u003e\u003cbr\u003eYes - the blade is forged from solid Ti-6Al-4V (Grade 5) titanium, the same aerospace alloy as the handle. It is non-magnetic and cannot rust.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a titanium blade hold an edge?\u003c\/strong\u003e\u003cbr\u003eHonestly: no, not like steel. At 53+\/-2 HRC it dulls faster than any knife steel, but it re-sharpens in seconds on a strop or stone and never chips. Buy it for corrosion immunity, not edge life.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the knife open and lock?\u003c\/strong\u003e\u003cbr\u003ePress the thumb stud and the ceramic ball bearing pivot swings the blade out one-handed; the crossbar lock wedges behind the tang from above and is fully ambidextrous and finger-safe on closing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow big is it?\u003c\/strong\u003e\u003cbr\u003e6.69\" (171 mm) open, 3.7\" (95 mm) closed, 2.99\" (76 mm) blade at 0.13\" (3 mm), and 79.2 g (2.79 oz) - a compact all-titanium folder.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTitanium blade or M390 blade Firefly Ultra?\u003c\/strong\u003e\u003cbr\u003eThe Ultra-ST is the rust-proof, non-magnetic, collector pick; the M390 versions are the working slicers. Choose the ST for water, sweat and the novelty of all-titanium construction.\u003c\/p\u003e\n\u003ch3\u003eTi-6Al-4V Titanium vs. Common Pocket Knife Steels\u003c\/h3\u003e\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSteel\u003c\/th\u003e\n\u003cth\u003eTypical HRC\u003c\/th\u003e\n\u003cth\u003eEdge Retention\u003c\/th\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003cth\u003eToughness\u003c\/th\u003e\n\u003cth\u003eSharpening Ease\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTi-6Al-4V titanium (this blade)\u003c\/td\u003e\n\u003ctd\u003e53+\/-2\u003c\/td\u003e\n\u003ctd\u003ePoor\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eEasy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e14C28N\u003c\/td\u003e\n\u003ctd\u003e59-61\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eVery Easy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCPM-S35VN\u003c\/td\u003e\n\u003ctd\u003e58-60\u003c\/td\u003e\n\u003ctd\u003eVery Good\u003c\/td\u003e\n\u003ctd\u003eVery Good\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBohler M390\u003c\/td\u003e\n\u003ctd\u003e60-62\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eFair\u003c\/td\u003e\n\u003ctd\u003eHard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eD2 Tool Steel\u003c\/td\u003e\n\u003ctd\u003e58-61\u003c\/td\u003e\n\u003ctd\u003eVery Good\u003c\/td\u003e\n\u003ctd\u003eFair\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003eThis blade is forged from Ti-6Al-4V, the aerospace titanium alloy - not a coated steel. It is completely immune to rust, saltwater and sweat, non-magnetic, and about 40 percent lighter than steel for the same volume. The honest trade: at 53+\/-2 HRC with no wear-resistant carbides, a titanium edge dulls far faster than any knife steel. Choose it for corrosion-proof duty, water sports, salt air and the novelty of an all-titanium folder - not as your main cardboard-slicer. HRC figures are typical mill ranges, not a guarantee for any single blade.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eGlossary of Key Terms\u003c\/h2\u003e\n\u003cstrong\u003eTi-6Al-4V (Grade 5 Titanium)\u003c\/strong\u003e\u003cbr\u003eThe aerospace workhorse titanium alloy - 6 percent aluminium, 4 percent vanadium. Non-magnetic, saltwater-proof and light, but softer than knife steels at 53+\/-2 HRC.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSwedge\u003c\/strong\u003e\u003cbr\u003eA bevel ground along the spine of the blade above the edge. It sharpens the tip's piercing geometry and lightens the profile without creating a sharpened false edge on this model.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eBead Blast Finish\u003c\/strong\u003e\u003cbr\u003eFine glass beads blasted at the surface produce a uniform matte grey texture that kills glare, hides scratches and matches the titanium handle.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eCrossbar Lock\u003c\/strong\u003e\u003cbr\u003eA lock bar spring-loaded across the handle that wedges behind the blade tang from above. Fully ambidextrous and finger-safe: pull the crossbar down and the blade falls closed.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eCeramic Ball Bearings\u003c\/strong\u003e\u003cbr\u003eZirconia pivot washers that run smoother and wear longer than steel washers - the reason a well-used flipper or thumb-stud action stays glassy for years.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eDeep-Carry Clip\u003c\/strong\u003e\u003cbr\u003eA pocket clip mounted low on the handle so most of the knife hides inside the pocket. This one is drilled for both left- and right-hand carry.\u003cbr\u003e\u003cbr\u003e\n\u003ch2\u003eWho Should Buy the Firefly Ultra-ST\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAnglers, boaters and kayakers who want a knife that laughs at saltwater.\u003c\/li\u003e\n\u003cli\u003eCollectors chasing the rare solid-titanium-blade production folder.\u003c\/li\u003e\n\u003cli\u003eAnyone who values an ambidextrous crossbar lock and ceramic bearings.\u003c\/li\u003e\n\u003cli\u003eHumid-climate carriers tired of wiping semi-stainless blades dry.\u003c\/li\u003e\n\u003cli\u003eBuyers who want premium titanium construction at $151.99.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho Should Skip It\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCardboard-and-rope workhorse buyers - a 14C28N folder holds an edge far longer.\u003c\/li\u003e\n\u003cli\u003eAnyone who wants a fidget-style flipper; this opens on a thumb stud.\u003c\/li\u003e\n\u003cli\u003ePry-prone users - a thin titanium apex rolls under lateral load.\u003c\/li\u003e\n\u003cli\u003eUltralight chasers at any cost - the Steel Firefly variants cut better at the same weight.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCare \u0026amp; Maintenance\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRinse the blade in fresh water after saltwater exposure - the titanium cannot rust, but grit and salt crust dull the action.\u003c\/li\u003e\n\u003cli\u003eWipe the bead-blast flats with a dry microfibre cloth; the matte texture hides carry wear by design.\u003c\/li\u003e\n\u003cli\u003eA strop with fine compound refreshes the titanium apex in seconds between real sharpenings.\u003c\/li\u003e\n\u003cli\u003eResharpen on any water stone or diamond plate at 18-20 degrees per side; titanium cuts fast and never chips.\u003c\/li\u003e\n\u003cli\u003eOne drop of light oil at the pivot every two months, then swing the blade a dozen times so oil reaches the ceramic bearing.\u003c\/li\u003e\n\u003cli\u003eBlow lint out of the crossbar-lock channel before oiling; grit under the lock bar makes the action gritty.\u003c\/li\u003e\n\u003cli\u003eCheck the body and clip screws every few months with the correct Torx driver.\u003c\/li\u003e\n\u003cli\u003eDo not pry with the tip; even a ductile alloy will roll a thin apex under lateral load.\u003c\/li\u003e\n\u003cli\u003eStore it closed and dry - the bead-blast finish traps pocket lint like any matte surface.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Trivisa Firefly Ultra-ST YD04-ST-T Titanium Blade Titanium Handle Crossbar Lock Folding Knife\",\n  \"sku\": \"YD04-ST-T\",\n  \"mpn\": \"YD04-ST-T\",\n  \"productID\": \"YD04-ST-T\",\n  \"description\": \"Trivisa Firefly Ultra-ST YD04-ST-T folding knife: 2.99 inch (76 mm) solid Ti-6Al-4V titanium swedge blade at 53+\/-2 HRC with a bead blast finish on 3.0 mm stock, titanium handle, crossbar lock, ceramic ball bearing pivot, thumb stud opening, steel pocket clip, 79.2 g, 6.69 inch (171 mm) overall. 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