ω-α Phase Transformation and Plastic Deformation in ω-Ti

ω-titanium (Ti) is a high-pressure phase that is conventionally perceived to be brittle and nondeformable, although direct investigations of its deformation process remain scarce. In this work, we perform molecular dynamics simulations to study the deformation process of ω-Ti with initial defects. We observe extensive ω-α phase transformation and multiple types of dislocation in ω-Ti. Moreover, for the first time, we demonstrate that four types of transformation twins can be formed through the ω-α phase transformation. This work advances the understanding of plastic deformation in ω-Ti and unveils the essential role of the metastable ω-phase in the formation of transformation twins.