Ag-20Cu macro-composite wires (volume fraction, %, similarly hereinafter), a new DMMCs(Deformation Metal-Metal Composites), were fabricated by metal clad metal method and post-severe plastic deformation. The mechanical properties of the composite wires were tested at different true strains η, and the size change of the Ag layer and the Cu layer and fracture morphology were observed by SEM. The deformation characteristics of the Ag layer and the Cu layer for the Ag-20Cu composite were studied by the above experiments. The results indicate that the deformation process of the composite mainly contains cooperating deformation between Ag and Cu layers due to their different mechanical properties and the modes of cooperating deformation at different stages are different. Because of work-hardening and recovery to different degrees during deformation, the property change trend of the composite is different and the effects of Ag and Cu layers on the properties of the composites are unlike