Due to the advantages of high specific strength and low density, the titanium alloy additive manufacturing structures are widely used in civil airliners and other fields. This paper takes the additive manufacturing cabin door hinge lug as the research object, and carries out structural mechanical tests on test pieces of the three configurations of the axial loading, oblique loading, and transverse loading to get the carrying capacity and failure modes. The following conclusions can be drawn from the tests: the average failure load under axial loading is 28.78 kN, the average failure load under oblique loading is 29.45 kN and the average failure load under transverse loading is 24.96 kN, and the results show that the carrying capacity of axial loading and oblique loading is higher than the carrying capacity of the transverse loading. The failure modes of the three configurations of the axial loading, oblique loading, and transverse loading are all shear failure, with the configuration of the oblique loading showing the tensile-shear composite failure. From the load-displacement curves, it can be seen that when the failure modes of the three configurations reach the failure load, the load is dropped dramatically, while the axial loading test appears more regular yielding stage. This paper provides the reference basis for the airworthiness verification and installing application on the additive manufacturing cabin door hinge of the service aircraft and the subsequent aircraft.