Abstract
Changes in microstructure and crystallite orientation distribution by continuous cyclic bending (CCB) and the subsequent annealing have been investigated in a commercial purity titanium. The sheet of the titanium worked by CCB with less dimensional change showed 1.3 times higher hardness than that before CCB on the surface. The CCB and the annealing formed the gradient microstructure with coarse-grained surface layers and fine-grained inside. Thickness of the coarse-grained layers could be controlled by the CCB process conditions. It was found that the transverse texture (TD//[0001] )appeared after the CCB and annealing in the surface layers.
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