Additive Manufacturing (AM) ameliorates the traditional techniques in the manufacturing process. The focus of the material used in this technique is AlSi10Mg. This is because the AlSi10Mg alloy has a low density and high-performance characteristic. The material used for AM to fabricate an end product has gained attention from both industries and researchers. This is to develop a completely novel technique in studying and optimizing material properties. Hence, this technique’s maturity needs strong literature support on mechanical properties affected by post-process for wider customized application. Meanwhile, the change of microstructure affected by post-process is also essential to understand the properties of the changed factor. Therefore, the post-processes, which are often applied to conventional cast aluminium alloy, are investigated. This paper reviews the effect of the post-process on microstructural behaviour and material properties. The tensile and ductility are the main concern for the mechanical properties and the effect of fatigue crack growth of AM material. This paper aims to understand the changes in properties and the relationship between microstructure and mechanical properties that are affected by post-process. This is because AM technology will revolutionize the manufacturing of goods and markets in future.