Abstract: Described herein is an aging process of a solution-heat-treated and quenched 2XXX-series aluminum alloy wrought product, comprising the steps of: (1) aging the product in a first aging step at one or more temperatures within a range of 90° C. to 120° C. for a cumulative period of time of at least 10 hours; and (2) subsequently aging the product in a second aging step at one or more temperatures within a range of 150° C. to 205° C. for a cumulative period of time of at least 4 hours. The wrought aluminum alloy can be processed to various product forms, e.g., sheet, thin plate, thick plate, extruded or forged products.