... nitrogen, carbon, hydrogen, iron, oxygen, aluminum, vanadium, tin, ruthenium, palladium, cobalt, molybdenum, chromium, nickel, niobium, zirconium, silicon, and titanium. ... zirconium, 4 % molybdenum) plus 0.04 % to 0.08 % palladium,19 Grade 21—Titanium alloy (15 % molybdenum, 3 % aluminum, 2 ... aluminum, 4 % vanadium) plus 0.04 % to 0.08 % palladium,22 Grade 25—Titanium alloy (6 % aluminum, 4 % vanadium) ...