<p>Ti/Ni magnetic multilayer films are widely used in neutron supermirrors, where the film-substrate adhesion strength is one of the key parameters for evaluating neutron supermirrors and has an influences the service lifetime of the supermirrors. In this study, Ti/Ni multilayers were prepared by magnetron sputtering, and the adhesion strength was improved by changing the buffer layer. Three different metals, Ta, Cr, and Zr, were selected as buffer layers for comparative investigation. The surface morphology of the three buffer layers was compared using AFM, and it was revealed that Zr-buffered multilayer reduced the surface roughness of the Ti/Ni multilayer film. Vibrating sample magnetometry (VSM) confirmed that none of the buffer layers significantly affected the magnetic properties of the Ti/Ni multilayers. Nano-scratch tests demonstrated that the Ta buffer layer degraded the adhesion strength, the Cr buffer layer showed a total thickness-dependent decrease in adhesion, and the Zr buffer layer for 10-cycle and 30-cycle enhanced the adhesion strength by 2.34 times and 3.33 times, respectively. Therefore, These results demonstrate that the Zr buffer layer effectively improves the interfacial adhesion and reduces surface roughness of Ti/Ni multilayers without compromising their magnetic performance, providing a viable solution to the adhesion challenges in Ti/Ni neutron supermirrors.</p>