Additive Manufacturing (AM) has introduced new perspectives in parts production, such as design freedom, part customization, weight reduction. Nonetheless, many problems need to be further investigated. For instance, conventional heat treatments, which have been optimized to improve cast parts, must be adapted for AM parts. This work follows a previous one, in which the process parameters to process a new AlSi10Mg+4Cu powder for Laser Powder Bed Fusion (LPBF) have been carried out. The principal aim of the present thesis is to find the optimized parameters for a T6 treatment of LPBFed AlSi10Mg+4Cu alloy. Conventional T6 heat treatment consists of three stages: solution heat treatment (SHT), quenching and artificial aging.