A turbine module comprises a stator assembly disposed annularly about a rotor assembly. The rotor assembly includes a plurality of turbine blades circumferentially distributed about a turbine disk. The stator assembly includes at least one case segment and an abradable surface disposed radially adjacent to a tip of each of the plurality of rotor blades. The turbine blades each include an airfoil section with a first gamma-phase titanium aluminide (gamma-TiAl) substrate, and the at least one case segment has a second gamma-TiAl substrate.
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