In order to store nuclear spent fuels for a long term, we propose the concept of stainless steel canister with titanium cladding. A parametric study on MIG brazing for titanium and stainless steel revealed that Cu-1Mn-3Si alloy (MG960) is promising MIG brazing material. The optimized brazing conditions showed adequate structural strength such as JIS G 0601 shear strength, tensile shear stress and peel strength.