<p>This study experimentally examines the microstructure, phase formation, tensile behaviour, microhardness, and wear resistance of aluminium Al5183 produced by Wire Arc Additive Manufacturing (WAAM) using Gas Metal Arc Welding. Thirty layers of a wall were built to assess the effects of repetitive thermal cycles on the mechanical properties and microstructure of the deposited materials. SEM with EDS and XRD analyses confirmed the presence of α-Al, β-Al₆Mn, and α-Al₂O₃ phases throughout all regions of the layer deposition. Additionally, the β-Al₁₂Mg₁₇ phase was observed in the top region, attributed to faster cooling under ambient conditions. The maximum tensile strength of 288.4&#xa0;MPa, with an elongation of 22.92%, was noted in the horizontal direction at the top region; the minimum tensile strength of 166.85&#xa0;MPa, with an elongation of 15.15%, was recorded in the vertical direction. Microhardness values varied along the wall, with the highest at 73.6 HV at the top and the lowest at 70.8 HV at the bottom. Tribological evaluation showed a minimum wear rate of 9 × 10⁻⁵ mm³/Nm and a coefficient of friction of 0.2716 for the Al5183-deposited wall. The results reveal a strong correlation between microstructure, phase formation, and mechanical reliability, offering valuable insights into the wear behaviour of the WAAM-fabricated Al5183-deposited wall for marine applications. The values obtained via the WAAM process exceed those from conventional welding due to rapid solidification and repeated thermal cycling, resulting in finer grains and a more homogeneous phase distribution that enhances mechanical performance.</p>