X-ray substructure analysis in cold-rolled titanium

Substructure development in cold-rolled α-titanium was investigated by X-ray diffraction line-broadening using a methodology which takes into account the texture formation of the material. The formation of defect structures is different for various grain orientations and gives rise to significant substructure-texture correlation already at lower deformation degrees. The main reason for the line-broadening and substructure differences, respectively, observed in the texture components is obviously the orientation dependence of mechanical twinning. TEM and EBSP investigations have shown that at lower deformation degrees three different twinning systems are activated.