Oxidation resistant low-alloyed Ti alloys with good ductility

Oxidation resistance enhancement of pure Ti often comes at the cost of reduced ductility, which is frequently the problem through alloying with sole Al, Si, W, Mo and B. To overcome the short coming of single element alloying, this paper proposes a multi-element low-alloying strategy to take advantage of synergistic effects and resolve the conflict between oxidation resistance and ductility. It demonstrates that the addition of a small quantity of Ta (0.51 wt [21̅1̅ 0]_Ti than along [0001]Ti. The completely transformed Ti2N region or partially transformed Ti + Ti2N region can effectively impede oxygen invasion. Therefore, the multi-element low-alloying strategy is promising for enhancing both oxidation resistance and mechanical properties of metallic materials in the future.