High temperature deformation behaviors of Ti-45Al-2Nb-1.5V-1Mo-Y alloy

► Soft β/B2 phase contributes to hot workability of TiAl alloy. ► This β γ-TiAl alloy possesses low Q value of 370 kJ/mol and wide processing window. ► The deformation mechanism is concluded as dislocation slip and mechanical twinning.