<p>Wire arc additive manufacturing (WAAM) is a promising technique for producing and repairing large, complex metal components with high deposition rates and cost-effectiveness. This study investigates the effect of torch oscillation on the bead profile, microstructure, and mechanical properties of low-carbon steel fabricated via gas metal arc welding (GMAW)-WAAM. A CLOOS^® GMAW welding unit with a six-axis robotic arm and ER70S-6 low-carbon, low-alloy steel wire is used for deposition. The study examines bead width, height, penetration, surface roughness, and microstructure under oscillation. Results show that torch oscillation increases bead width and surface quality while reducing bead height and penetration compared to non-oscillated deposition. Microstructural analysis reveals fine-grained ferritic phases and uniform grain distribution in oscillated samples. Improved hardness, tensile strength, and elongation are also observed in oscillated deposits. These findings demonstrate the potential of torch oscillation in enhancing bead quality and mechanical performance, making it beneficial for optimizing GMAW-WAAM.</p>