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Selective Laser Melting (SLM) is a promising manufacturing technique for aluminium. However, the strength of AlSi10Mg is relatively low for applications such as automotive industries. The addition of copper, as a common practice to obtain higher strength, is investigated in this study. The post-SLM heat treatments were also investigated to further improve the mechanical properties. Simultaneously, the thermal gradient during manufacturing is high and directional due to the high energy density provided by the laser beam, resulting in preferentially growth of crystals and thus unique microstructure and texture. Therefore, the present work investigated the effect of alteration of scanning strategies on the formation of texture. In this study, the selective laser melting technique is applied on the AlSi10Mg and AlSi10Mg + 4wt% Cu alloys, with conventional casting and T6 process as a reference, in order to investigate the influence of copper addition and different scanning strategies on the mechanical properties. The optimal scan speed and laser power have been determined as 1500mm/s and 300W, respectively, with the relative density higher than 99.0% for both AlSi10Mg and copper-modified AlSi10Mg alloys. Finer microstructure and better mechanical properties compared with the casting followed by T6 heat treatment sample were obtained. The Copper addition improved the ultimate tensile strength and the yield strength of the AlSi10Mg alloy, with a sacrifice on the ductility. The T6 heat treatment further improve the tensile strength of the AlSi10Mg+Cu alloy, with comparable ductility compared to the SLM as-built state. The bidirectional scanning without and with 90° rotation result in weak anisotropy on the mechanical properties of the AlSi10Mg + 4wt% Cu alloy.