We have developed new processing to produce thin TiNi alloy sheets. This processing is composed of repetitive roll-bonding for making a TiNi laminated sheet from Ti and Ni, and of subsequent heat treatment for leading to reactive diffusion. The Ti/Ni laminated sheet changed to a nearly single TiNi phase material through the formation of Ti2Ni and Ni3Ti intermetallic phases by solid phase reaction. The TiNi sheet consisted of a near <111>//ND texture such as {223}<110> in the B2 parent phase. Planar anisotropy of shape memory strain was not pronounced in this material due to an isotropic character of the {111} texture. The formation of such texture by reactive diffusion has been discussed in view of texture inheritance.