This study investigates the application of Friction Stir Welding (FSW) in joining AA2014 aluminum alloy for light structures. The FSW technique, a solid-state process, demonstrated its superiority over conventional riveting by producing joints with higher load-carrying capabilities due to metallurgical bonding in the weld region. Proper material flow and optimized process parameters enabled the formation of sound weld joints. The dissolution of precipitates in the aluminum matrix and the favorable distribution of second-phase particles in the stir zone (SZ) enhanced the mechanical properties and performance of FSW joints. In contrast, riveted joints rely on mechanical bonding, which limits their structural integrity and load-bearing capabilities. The findings underscore the potential of FSW to replace riveted joints, offering improved structural integrity and performance in critical aerospace applications. © 2025 Elsevier B.V., All rights reserved.