What is pure titanium rod? Titanium Grade 1 is an unalloyed, low strength titanium product containing low oxygen with high formability; this titanium gradeis used in airframes, heat exchangers and desalination units. Titanium Grade 2 is an unalloyed, medium strength titanium product. This titanium grade is used in airframes, aircraft engines and marine parts; good weldability and corrosion resistance are its distinguishing characteristics.