“…A great deal of research has been carried out in the past few years to determine the effect of alloying on mechanical properties and to ameliorate the poor ductility of the Ti 3 Al-based alloys at room temperature by the addition of alloying elements [3][4][5][6]. Ti 3 Al-Nb alloy is a favorable alloy system for a structural material in the Ti 3 Al-based alloys because the addition of Nb not only improves the room temperature ductility by activating a non-basal slip but also enhances oxidation resistance [7][8][9]. Modification of the chemical composition, however, can bring about significant complexities in the phase transformation and microstructural evolution in the Ti-AlNb system.…”