Anodised GR5 titanium bolt for bicycle Low density, rustless, high strength, recycled and durable ,excellen ... drawing and specification. 3.Material of Titanium: Commercial Pure (CP) Titanium: Gr1, Gr2, Gr3, Gr4. Titanium Alloy: Gr5 , Gr7 , Gr9 , Gr12 , etc.4.Features ...