“…Although considerable progress has been achieved, the potential of Ti-Al-Nb alloys for replacing the nickel-based superalloys in the engine parts remains limited by the difficulties in smelting and processing [4], as the melting points, densities, and vapor pressures of the Ti, Al, and Nb elements differ significantly. For a Ti 44 Al 48 Nb 8 alloy with low Nb content, the large-scale components with desired shapes were prepared by the electromagnetic levitation method and pressure die-casting [5,6]. However, the Ti- (18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)Al- (12.5-30)Nb (at.%) alloys with high Nb content may contain intermetallic phases of Ti 3 Al (α 2 ) and Ti 2 AlNb (O) with a high alloying degree, and element segregation will occur during smelting.…”