Directly manufactured in our Baoji multi-axis machining facilities. Every batch undergoes strict spectral metallurgy verification, rolled thread geometry control, and 100% thread gauge go/no-go validation.
Ti-6Al-4V Grade 5 forged & CNC milled; 12-point bi-hex head eliminates socket slip under extreme high-torque racing conditions.
Engineered for extreme internal cylinder boost pressure; precision thread-rolled to preserve grain continuity and achieve ≥950 MPa tensile resistance.
CNC low-profile head with precision T40 Torx drive. 44% lighter than standard steel bolts, immune to chloride corrosion and road grime.
Ultra-light valvetrain components designed to eliminate valve float at 9,000+ RPM. Multi-axis CNC turned to 0.005 mm runout tolerance.
Full 5-axis CNC milled from billet TC4 plate. Delivers immense rotational inertia reduction and high thermal stability under cyclic braking.
Specialized PVD surface modification prevents galling and thread seizure in continuous 650°C turbo and exhaust manifold heat cycles.
Compliant with DIN and GB dimensional standards; engineered with integrated serrated or smooth flange for load dispersion in structural chassis links.
Hex-drive broached end for rapid precision installation. Includes self-locking 12-point nuts and load-spreading washers in matched kits.
Headquartered in Gaoya Village Industrial Zone, Baoji, Shaanxi—widely recognized as China's Titanium Valley—Vunza Titanium Industry Co., Ltd. sits directly adjacent to the Baoti Group Industrial Park, controlling raw metallurgical feedstock integrity from vacuum sponge smelting to microscopic dimensional inspection.
Unlike small machining workshops purchasing uncertified secondary scrap rods, we execute full metallurgical batch tracking starting from raw titanium sponge. Every run comes certified with chemical composition spectroscopy and mechanical elongation/tensile test documentation adhering to ASTM B348, ASTM F136, and AMS 4928 standards.
Our machining floor operates 3-axis, 4-axis, and 5-axis simultaneous CNC milling centers alongside dual-spindle Swiss-type lathes. We routinely hold micro-tolerances down to ±0.005 mm, ensuring concentricity and thread runout compliance that eliminate manual assembly adjustment on industrial assembly lines.
Thread cutting disrupts metal grain flow, causing micro-notches susceptible to cyclic fatigue shear. We employ dedicated CNC thread rolling dies that compact titanium crystal grains along the root radius, increasing fastener shear fatigue strength by up to 30% over single-point cut threads.
Titanium fasteners can suffer from micro-welding friction (galling) when tightened against matching titanium or stainless steel bores. We provide proprietary Physical Vapor Deposition (PVD), titanium carbonitride coatings, MoS2 dry film lubricants, and Type II anodizing that lower friction coefficients below 0.12.
Over 50% of our technical workforce possesses more than 13 years of specialized titanium machining experience. Our in-house engineering team provides Design for Manufacturability (DFM) reviews within 9 hours, identifying cost-saving thread undercut, chamfer, and tooling optimizations before batch production.
Holding a continuous 13-year verified export track record and a flawless 5.0/5 buyer rating across international trade platforms, our documentation simplifies customs clearance with EN 10204 3.1 Mill Test Reports, RoHS, REACH, and optical dimension inspection files included with each pallet.
Selecting the right titanium alloy requires balancing yield strength, fracture toughness, thermal expansion, and electrochemical compatibility. Below is the engineering benchmark for our standard production runs.
| Alloy Grade | Nominal Chemical Composition | Min. Tensile Strength (MPa) | Min. Yield Strength (0.2% MPa) | Density (g/cm³) | Target Industrial Application |
|---|---|---|---|---|---|
| Grade 2 (CP Ti) | Commercially Pure Ti (Fe ≤ 0.30, O ≤ 0.25) | ≥ 345 | ≥ 275 | 4.51 | Chemical processing vessels, marine desalting fasteners, flue gas scrubbers, electroplating racks. |
| Grade 5 (Ti-6Al-4V / TC4) | 6% Al, 4% V, Balance Ti | ≥ 895 | ≥ 828 | 4.43 | Aerospace structural joints, engine cylinder head studs, motorsport suspension bolts, high-pressure piping. |
| Grade 7 (Ti-0.15Pd) | 0.12 - 0.25% Palladium, Balance Ti | ≥ 345 | ≥ 275 | 4.51 | Severe reducing acid media, offshore chemical injection, hot chloride environments vulnerable to crevice attack. |
| Grade 23 (Ti-6Al-4V ELI) | 6% Al, 4% V (Extra Low Interstitials) | ≥ 860 | ≥ 795 | 4.43 | Surgical orthopedic bone screws, cryogenic hardware, deep-sea submersibles requiring exceptional fracture toughness. |
| Grade 9 (Ti-3Al-2.5V) | 3% Al, 2.5% V, Balance Ti | ≥ 620 | ≥ 483 | 4.48 | High-pressure aerospace hydraulic lines, performance bicycle frames, lightweight marine tubular fasteners. |
Design Tip for Structural Engineers: Titanium Grade 5 offers an ultimate tensile strength approaching Class 10.9 alloy steel while cutting assembly weight by 44.5%. However, titanium possesses an elastic modulus roughly half that of steel (~114 GPa vs. ~210 GPa). Joint designs must accommodate greater bolt stretch under torque, requiring specialized torque-tension clamping calculations to avoid joint relaxation.
As global industrial manufacturing transitions toward electrification, hydrogen infrastructure, and extreme-environment exploitation, the demand for precision titanium fastening hardware is experiencing transformative structural shifts.
Next-generation electric hypercars and commercial heavy-duty EV platforms are aggressively replacing stainless steel hardware with Grade 5 titanium bolts in structural battery packs. Titanium's zero magnetic permeability prevents parasitic eddy-current induction in high-voltage busbars, while dramatic weight savings extend battery range and optimize axle load distribution.
Proton Exchange Membrane (PEM) electrolyzers operate in aggressive acidic and humid environments where standard 316L stainless steel suffers nickel and iron leaching, poisoning catalytic platinum membranes. Titanium Grade 2 and Grade 7 fasteners are rapidly becoming mandatory procurement standards for electrolyzer stack tie-rods and bipolar plate clamping.
With global investments surging in offshore wind foundations and sea-water reverse osmosis (SWRO) facilities, lifecycle cost analysis has decisively superseded initial purchase price. Titanium fasteners provide an operational service lifespan exceeding 30 years without cathodic protection, eradicating multi-million-dollar maritime maintenance interventions.
Titanium is notoriously difficult to machine due to its poor thermal conductivity (which traps heat at the cutting edge) and high chemical reactivity at elevated temperatures. Vunza Titanium pioneers modern manufacturing methodologies that conquer these physical barriers.
Traditional flood coolant frequently vaporizes before penetrating the intense shear zone of titanium machining chips. Our multi-axis CNC centers integrate high-pressure (up to 70 bar) micro-targeted coolant channels directly through the cutting insert. This suppresses thermal plastic deformation, prevents work-hardening, and guarantees micro-inch surface finishes on precision fastener shanks.
For high-volume production of aerospace-grade 12-point bolts and hex flange heads, full-bar CNC removal generates excessive material waste. We utilize induction heating induction zones that warm titanium stock to 750°C - 850°C under protective argon atmospheres, plasticizing bolt heads without embrittling alpha-case contamination.
To achieve zero-defect PPM thresholds for automotive racing and medical clients, our production lines conclude with high-speed 360-degree glass dial laser optical inspection. Every single bolt is automatically scanned for thread pitch pitch diameter, crest damage, head concentricity, and microscopic surface crack detection.
Essential technical guidelines, minimum order requirements, and engineering considerations answered by our Baoji factory technical team.
Consult directly with our Baoji engineering department. Send your CAD drawings, required mechanical grades, target quantities, and surface finish requirements for an actionable DFM review and quotation within 9 hours.