... 3. 1" Steering Tube 4. Disc and V Brake Titanium Fork for MTB Bike Frame Material:3Al/2.5V titanium with 6Al/4V ... titanium frames (road, triathlon, track, BMX, cycloss etc. ), titanium bicycle parts (handlebar, clamp, stems, seat posts, fork, spacer, headset etc ... . ) and titanium material for bicycle manufacturing (Gr.9/Gr.5 titanium tubing, rods, sheet, welding ...