The investigation on the unstable flow behavior of Ti17 alloy in α+β phase field using processing map

► Five instability criteria were employed to delineate the unstable flow regions. ► The material exhibited unstable flow at higher strain rates and entire temperatures. ► Semiatin's criterion under-predicts the instability regions. ► Gegel's and Malas's criteria over-predict the instability domains. ► Prasad's and Murty's criteria predict the unstable domains more accurately.