Abstract: To investigate the effects of different oscillation paths (no oscillation, 8-shaped, and triangular types) on the interface microstructure, intermetallic compound (IMC) layer thickness, tensile strength, and fracture behavior of Al/Ti dissimilar metal joints during the laser welding-brazing process, Al/Ti composite joints were prepared by laser welding-brazing technology. By using the oscillation path of the laser spot as the key process variable, the weld morphology and interface microstructure were characterized by optical microscopy, scanning electron microscopy, and energy dispersive spectroscopy. Moreover, the mechanical properties and fracture mechanism of the joints were analyzed in combination with tensile tests. The results indicate that, compared with no oscillation, the 8-shaped and triangular oscillation paths can effectively increase the spreading length of the brazing filler metal on the surface of the Ti alloy and significantly inhibit the growth of interfacial IMC. Under the 8-shaped oscillation, the interfacial IMC thickness is the thinnest, ranging from 0.9 to 3.19 μm. element analysis confirms that Si aggregates at the Ti/Al interface, forming a Ti(Al, Si)₃ ternary phase. In terms of mechanical properties, the tensile strength of the joint without oscillation is the lowest (119.19 MPa). The fracture occurs at the thicker Ti/Ti(Al, Si)₃ interface or the Ti(Al, Si)₃ layer, presenting typical brittle fracture characteristics. The oscillation paths effectively improve the joint strength by refining the IMC layer.