{1124} Deformation Twinning in Commercial Purity Titanium at Room Temperature

This is the accepted manuscript. It is currently embargoed pending publication.Definitive evidence from both electron back-scattered diffraction and transmission electron microscopy is shown for the existence of 1124 twinning as a rare deformation twinning mode in coarse grained commercial purity titanium after room temperature ballistic impact testing at 103 s−1. Non-Schmid-based twin type selection is demonstrated for 1124 and the conjugate 1122 deformation twinning modes in this material within grains where the c-axis is closely aligned to the loading direction. Limited Schmid-based twin variant selection is shown for 1124 and 1122 deformation twinning modes in this material. The occurrence of high area fractions of 1124 twinning has relevance for high strain rate plasticity modelling of grains of textured titanium compressed parallel to their c-axes.This work was supported by the Rolls-Royce plc / EPSRC strategic partnership under EP/H022309/1