titanium mtb bike frame aerospace grade 3AL-2.5V ... harmony between the cycle and cyclist. Therefore, of all the metals, including aluminum, steel and carbon fiber ... ability to resist being eroded by contact with outside materials such as dirt, sand, ice, mud, etc. ... Corrosion Resistance (rust free) Titanium is corrosion proof in all naturally occurring environments, Acid? Damp? Ultraviolet rays? ...