Why is vanadium added to titanium alloys used in jet aircraft?

Vanadium is added to titanium alloys used in jet aircraft primarily to improve their strength and promote thermal stability.1

In the context of titanium processing, vanadium acts as a beta-stabilizing element. By stabilizing the beta phase, vanadium helps create alloys that offer a superior combination of strength, toughness, and formability. These properties are essential for the demanding environments found in the undercarriages, wings, and engines of jet aircraft.21