The fracture mechanism of the samples after the tensile test is discussed in this section. A ductile fracture occurs in metals with profound ductility and high toughness, such as Aluminum. It begins with germination, growth, and fusion of micro-holes near the cross-sectional center of the sample under tensile stress. Void creation and coalescence, crack propagation, and failure are the main processes in ductile fracture, which commonly result in a cup-and-cone-shaped failure surface.