{112¯4} deformation twinning in pure Ti during dynamic plastic deformation

Highlights: ► Pure Ti samples were deformed by dynamic plastic deformation (DPD). ► There were four and tree types of deformation twins during DPD and quasi-static compression, respectively. ► {112¯4} twinning was only found in DPD samples. ► The high strain rate affected the formation of {112¯4} twinning - Abstract: The type of deformation twins in purity titanium after dynamic plastic deformation (DPD) and quasi-static compression (QSC) at room temperature is investigated by electron backscatter diffraction techniques, respectively. DPD with a high strain rate (4.5–5 × 102/s) activates more deformation twins in Ti. Four types of twins have been identified in DPD samples, while three types of twins in QSC samples. The {112¯4} twinning is only observed in DPD samples, associating with the {112¯2} twinning. The misorientations of {112¯2}–{112¯4} variant pairs are 12–13°, suggesting they follow the same misorientation profile (011¯0) plane and rotated direction.