<p>The impact of trace V on the microstructure and mechanical characteristics of the Al-Zn-Mg-Cu alloy produced by twin-roll casting has been examined. Following homogenization, AlZnMgCu, S-Al₂CuMg, and Al₇Cu₂Fe were among the primary phases that remained after the majority of the eutectic structure dissolved. The impact of dispersoids on the mechanical characteristics and intergranular corrosion resistance were examined, along with the precipitation behavior and recrystallization of Al₃Zr and Al₂₁V₂ in the alloy. The hardness and yield strength of the V-containing alloy increase after homogenization, rolling, solution, and aging treatment. This enhancement may be attributed to the fine Al₃Zr and Al₂₁V₂ particles’ precipitation strengthening, which augmented the traditional <i>η</i>′ phase precipitation strengthening. With the addition of V, the aging treatment alloy’s intergranular corrosion resistance was enhanced since there were fewer high-angle grain boundaries.</p>