Effect of thermo-mechanical processing on microstructure and mechanical properties of near α titanium alloys

A near α Ti-1100 alloys with TiC (1%vol) ceramic particles reinforcement were fabricated. The ingots were breakdown at 1150 °C. The βt temperature of this material was examined by metallographic method. The ingots after breakdown were forged with various thermo-mechanical processing parameters. According to the deformation performed in β phase field, α+β phase field, or upper α phase field, four varieties hot deformation are classified, i.e. deformation in β phase field, deformation started in β phase field and finished in α+β phase field, deformation in α+β phase field and deformation in upper α phase field. The characters of microstructure evolution are different in the four varieties deformation process. The microstructure evolutions during four varieties deformation process were discussed comprehensively. The discussion will be intended to be helpful in understanding the process of microstructures evolution and microstructures control of near α titanium alloys during various thermo-mechanical processing. Tensile tests after various hot deformations were conducted at room temperature.