Rolling　can　accelerate　the　aging　precipitation　behavior,　whilst　shorten　the　incubation　time　for　the　emerge　of　peak　aging.　The　Al-2Mg-0.8Cu　alloy　with　80%　reduction　reaches　peak　aging　after　annealing　for　1　h.　The　maximum　solid　solubility　of　Si　in　Al-2Mg-0.8Cu　alloy　is　0.3%　(mass　fraction),　which　can　further　accelerate　the　kinetics　process　of　aging　precipitation　and　refine　the　size　of　S-phase.　The　Al-2Mg-0.8Cu-0.15Si　alloy　after　cold　rolling　with　40%　reduction　achieved　the　properties　of　yield　strength　of　240　MPa,　tensile　strength　of　353　MPa,　elongation　at　break　of　16.5%　and　tensile　strength-plastic　product　of　5.66　GPa·%.　40%　cold　rolling　reduction　and　addition　of　0.15%　Si　(mass　fraction)　are　the　optimal　process　combination　to　obtain　the　best　mechanical　properties.　©　2023　Chinese　Journal　of　Materials　Research.　All　rights　reserved.