PREDICTION OF TRANSFORMATION TEXTURE IN PURE TITANIUM SHEET BY ORIENTATION DISTRIBUTION FUNCTION

The transformation texture in titanium cold rolled and annealed at 1273 K was investigated by means of the orientation distribution function method. The texture in beta -phase at elevated temperature is predicted by Burgers' relationship from the texture in the alpha -phase which is possible to measure at room temperature. The deformation and recrystallization textures in alpha -phase of a 70% rolled sample were similar to those of a 90% rolled one. However, the textures in alpha -phase after sequential alpha to beta and beta to alpha transformations were different depending on the reduction. The reasons for the occurrence of a variant selection have been discussed from the viewpoint of oriented strain.