Effect of the speed ratio on grain refinement and texture development in pure Ti during differential speed rolling

The effect of the roll speed ratio (SR) on the microstructure, texture and mechanical properties of commercially pure Ti during differential speed rolling was examined at 673 K in a wide range of SRs between 1 and 5 to produce Ti sheets with an ultrafine-grained microstructure exhibiting high strength. At an SR of 5, a defect-free sheet with shear bands and ultrafine grains homogeneously distributed over the entire thickness of the sheet could be fabricated through a single rolling pass.