Titanium aluminide alloys have been considered for application as high temperature structural materials due to their combination of low density, high specific strength, low diffusivity, good resistance against oxidation and corrosion, and high ignition resistance. Especially, high Nb containing TiAl alloys have improved tensile strength, creep strength as well as oxidation resistance than the ordinary TiAl alloys, have been focused on in recent studies. Up to now, high Nb containing TiAl alloys have not yet been widely applied because of their room temperature brittleness and limited workability. In this paper, the research results of vacuum arc melting, near Isothermal canned forging and hot-pack rolling of a high Nb containing TiAl alloy are showed. The microstructure evolution and mechanical properties of the high Nb containing alloy sheets prepared by hot-pack rolling methods were investigated.