Abstract <p>We report physical modeling of the forming process for a panel from AK4-1 (Al–Cu–Mg) alloy under creep conditions at an annealing temperature of 420°C. The forming process was imitated by creep tension of circular cylindrical specimens to various strain levels no higher than 6%. Creep test results were used to determine parameters of the Boyle–Norton classic model for steady-state creep. In accordance with the forming process under creep conditions, the specimens were heat-treated (quenching and aging) in order to restore the strength properties of the panel. The stress for fatigue tests was determined using stepwise cyclic loading with increasing stress amplitude. The tests were stopped when plastic deformation was observed. We compared fatigue failure resistance characteristics of as-received specimens, specimens stretched upon creep and after heat treatment, and specimens with zero creep strain after heat treatment. Our results demonstrate that accumulated creep strain above 2% can lead to a decrease in the fatigue characteristics of the specimens in comparison with those of the as-received specimens.</p>