Because of the new type of high strength aluminum and copper alloys have good mechanical properties, high tensile strength, and good plasticity, high temperature resistance and cutting workability, in the field of aerospace and civil engineering has been applied in all, the alloy is a dual-use alloy casting and deformation, more broad application prospect. Composition of alloy preparation for (mass fraction, %) : 4.5 ~ 5.2 Cu, Mn of 0.3 ~ 0.4, 0.3 ~ 0.4 Ti, 0.1 ~ 0.2 Cd, Zr of 0.1 ~ 0.2, 0.04 ~ 0.05 B, 0.10 ~ 0.02 RE, Cr of 0.1 ~ 0.2, the allowance of Al. Experiment material is directly formula smelting, pouring into the blank sample, and then in the quenching furnace water quenching to room temperature to 550 ℃ x 16 h of solid solution treatment, the prestressing tension on a tensile testing machine, the deformation control in 1% ~ 9%, and then to 145 ℃ in the circulation of box-type furnace x 20 h of aging treatment. Sample after solid solution treatment predeformation tensile experiments, the strength of the alloy after aging, is a kind of effective reinforcement method, but the plastic will decline. 5% predeformation to promote more strengthening phase in the substrates (theta. '