Deformation twinning and mechanical property of strongly textured titanium deformed at low temperatures

Abstract

The exploration of deformation behaviors within titanium and its alloys across a spectrum of temperatures, in particular at the low temperature range, is imperative for the development of strong and tough titanium alloys. This study has been meticulously devised with an emphasis on the deformed microstructure and mechanical property of pure titanium at temperatures of 77 K, 180 K, 240 K, and 298 K. Tensile results indicate a concurrent enhancement in both strength and ductility, as well as the work hardening capacity, as the deformation temperature decreases. Quantitative analysis demonstrated such superior mechanical properties and hardening capacity are attributed to the high twin density and the predominant twin variations converting from {11−22} twins to {10−12} twins at low temperatures. Therefore, the present study potentially offers insights into the understanding and development of titanium alloys by facilitating the strategic manipulation of temperature-mediated twin activity.