In order to optimize the usability, microstructure and mechanical property of TiAl based alloy after
hot isostatic pressing and hot treatment was studied. After heat鄄treatment of 1 355益, organization of TiAl based alloy
transformed to full lamellar microstructure. After heat鄄treatment of 1 335益, organization of TiAl based alloy trans鄄
formed to double pattern microstructure. Tensile strength of full lamellar TiAl under room temperature is 446 MPa,
and will increase with temperature; yield strength of full lamellar TiAl under room temperature is 386 MPa, and will
increase with temperature.