China Wholesale Titanium Machined Components Factory & Supplier

Galling occurs when micro-asperities on titanium threads shear through the passive oxide layer under friction and pressure, welding the surfaces together. We eliminate this failure mode at two levels: First, through ultra-precise radial thread rolling that creates smooth root radii (Ra ≤ 0.4 µm) free of torn grain boundaries. Second, we engineer fasteners for use with specific anti-seize lubricants (copper- or molybdenum-disulfide-based) or apply functional anti-friction coatings such as PVD-deposited Diamond-Like Carbon (DLC) or micro-arc oxidation, which provide dry lubricity.

Grade 5 titanium features an ultimate tensile strength of approximately 895–950 MPa, which places it slightly above ISO Class 8.8 structural steel (800 MPa). It is not an identical 1:1 cross-sectional substitute for ISO Class 10.9 (1000 MPa) or Class 12.9 (1200 MPa) fasteners in pure tension or shear-dominant shear joints without engineering review. For high-shear hubs or structural chassis mounts, we routinely work with customer engineering teams to upsize bolt diameters (e.g., transitioning an M8 10.9 steel bolt to an M10 Grade 5 titanium bolt), yielding a net 30% weight reduction while preserving required shear safety margins.

Because titanium's elastic modulus (114 GPa) is roughly half that of steel (205 GPa), a titanium bolt stretches roughly twice as much as a steel bolt under the same clamp load. When dry, titanium has a higher friction coefficient (μ ≈ 0.30–0.40). When installing Velnora Grade 5 hardware with proper anti-seize paste (μ ≈ 0.10–0.12), torque should generally be calibrated to 70–80% of standard Class 8.8 steel dry torque values to achieve the correct pre-load tension without overstressing the joint.

We manufacture strictly to DIN (e.g., DIN 912, DIN 933, DIN 985, DIN 7991), ISO metric, ANSI/ASME (inch unified standards), and JIS specifications. For custom non-standard components, our engineering CAM team accepts 3D parametric models in STEP (.stp), IGES (.igs), and native SolidWorks files, paired with 2D engineering drawings (.pdf, .dwg) that specify geometric dimensioning and tolerancing (GD&T), thread classes (typically 6g for bolts and 6H for nuts), and critical surface finish parameters.

Unlike aluminum anodizing, which relies on organic dyes sealed inside a porous oxide layer, titanium anodizing is an electrochemical process that grows a transparent titanium dioxide (TiO&sub2;) layer. The observed colors (gold, bronze, purple, cyan, blue, rainbow) result from optical light interference—the refraction of light waves passing through the oxide film to the metal and reflecting back. Because no pigments are used, the color is completely impervious to UV fading and will not chip or leach in harsh saltwater or road-salt environments.

For standard catalog fasteners and established configurations (e.g., M5/M6 disc rotor bolts, bicycle stem caps), our MOQ starts at 100 to 200 pieces per size/color. Specialized wire-EDM Timascus / Mokuti products are available starting from 1 to 10 pieces. Custom bespoke CNC prototype runs typically require 10 to 15 business days for initial samples, while volume production runs (5,000–50,000 pieces) average 20 to 30 calendar days including full CMM optical inspection, thread rolling, anodizing, and export packing.