<p>The joining of titanium with steel in dissimilar joints is crucial in various industrial applications, presenting challenges due to their distinct physical and metallurgical characteristics. Brittle intermetallic compounds in the joint can lead to reduced strength and increased brittleness. To improve joint strength, various techniques, such as laser surface texturing, can be employed. The evaluation included optical microscopy, scanning electron microscopy, shear-tensile testing, microhardness testing, and wettability assessments. Brazing of the base metals was carried out at 1100 °C for 15 min. Four different textures were created on 17-4 PH surfaces using a fiber laser, with groove distances of 100, 200, 300, and 400 µm, respectively [<CitationRef CitationID="CR1">1</CitationRef>]. The application of these textures has minimal impact on the microstructure. Due to their shallow depth, these can locally change the phase formation as a result of the high cooling rate; however, this surface microstructure change does not significantly influence the properties of the joint. The findings indicate that optimal joint properties were achieved at a laser groove distance of 400 µm, which produced an average shear strength of 48.80 MPa. This represents a 27% increase in strength over the untreated joint. Furthermore, a 42% reduction in the contact angle—observed in the L4 sample as a decrease from 8.80° to 5.10° compared to the untreated sample—correlates directly with the 27% improvement in strength. This study demonstrates that grooves fabricated with a fiber laser can effectively control the microstructure and improve the mechanical properties of Ti-6Al-4V alloy joints with 17-4PH martensitic stainless steel. These results establish this technique as a viable and effective method for strengthening such critical dissimilar metal joints.</p>