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Selective Laser Melting (SLM) was used to fabricate Ti-Ni shape memory alloys. The effect of scanning speeds on alloys was studied using OM, SEM, XRD, and room-temperature compression. The results show that with increased laser scanning speed, the internal defect morphology changes from a nearly regular spherical shape to an irregular one. For instance, the width and continuity of the molten pool morphology decrease with the increase in laser scanning speed. Besides, the increasing laser scanning speed initiates B19" martensite content decreases, B2 austenite content increases, and the phase transition peak is reached during the transformation process. At 900 mm/s of the scanning speed, the relative density of the alloy reaches 98.5%, yielding the minimum internal defects. Simultaneously, the sample has a maximum compressive strength of 3120 MPa and a compressive strain of 41%, which is the best printing parameter to produce exceptional properties.