There have been limited studies on the effect of shear strain on both the microstructure and microtexture evolution during accumulative roll-bonding (ARB) of dissimilar metals. Particularly, there have been difficulties in producing uniform multilayers consisting of a less ductile phase and a more ductile phase. In the current investigation, Cu/Ta multilayered structure was fabricated by processing annealed Cu and Ta strips for up to 8 ARB passes at 673K. The ARB-processed samples consisted of 2, 4, 8, 16, 32 and 256 layers with individual layer thicknesses of 200, 100, 50, 25, 12.5 and 1.56 um, respectively. Shear strain in the samples was calculated by embedded-pin experiment for the first ARB pass and approximated for further passes using a newly developed algorithm. Layers showed necking and discontinuity after 8 ARB passes. Significant grain refinement was observed after ARB processing. Detailed microtexture evolution will also be presented.