 2219 aluminum alloy fabricated by laser tungsten inert gas, TIG, hybrid method underwent solution plus artificial aging treatment, T6 heat treatment resulting in improved strength and elongation. The strengthening mechanism was analyzed revealing that the columnar crystal grain morphologies remained the same as the ass-deposited condition while a strong 001 texture along the building direction and high density of needle-shaped phases were uniformly precipitated after artificial aging. Distinct grain morphology increased mass fraction of Cu in the L matrix and nano precipitates in the Az and Lz improved the tensile properties resulting in a yield strength of 242.1 plus or minus 19.6 MPa and an ultimate tensile strength of 407.1 plus or minus 31.1 MPa. This article was authored by Dahua Liu, Dong Jiang Wu, Guanyi Ma and others.