On the influence of processing parameters on microstructural evolution of a near alpha titanium alloy

► The flow stress decreased with increasing temperature and decreasing strain rate. ► The lamellar α within the β grain was distorted, broken up and spheroidized with increasing strain rate. ► Recrystallized grains were formed at the prior-β grain boundaries in the β field. ► The degree of dynamic recrystallization increased with increasing temperature, strain rate and strain. ► The recrystallized grain size increases with increasing temperature and decreasing strain rate. The effect of processing parameters on the microstructural evolution of Ti60 alloy were examined by isothermal compression tests over the temperature range of 960–1110 °C at constant strain rates of 0.001–10 s −1. It was found that the flow stress decreased with increasing temperature and decreasing strain rate. The flow stress behavior revealed greater flow softening in the α + β phase field compared with that of β phase field. The volume fraction and grain size of primary α phase decreased and the prior-β grain size increased with increasing temperature. The lamellar α phase within the prior-β grains were distorted, broken up and globularized in the α + β phase field, while a small amount of recrystallized grains were formed at the elongated prior-β grain boundaries in the β phase field. The degree of dynamic recrystallization increased with increasing temperature, strain rate and strain. The recrystallized grain size increased with increasing temperature and decreasing strain rate.