Abstract: We studied mechanical properties of the ultrafine-grained (UFG) alloy of Al–1.5 Cu (wt %). UFG structure has been formed by processing the alloy by high-pressure torsion (НРТ). The UFG alloy shows high values of microhardness (1690 MPa), yield stress (515 MPa), and ultimate tensile strength (655 MPa), but low ductility (~3%). Short-term annealing at 150°C and the subsequent small HPT deformation of 0.25 turns at RT have led only to a slight decrease in the alloy should be replaced by strength to 450 MPa, which was ~70% of the value before annealing, but provided high plasticity (~22%). This implies a high potential for practical application of the alloy under study. The proposed approach may serve as a universal effective way to achieve a combination of high strength and high plasticity for various UFG materials.