The technique used in solder or foil forms to assemble hetero-junction between stainless and 8Y-zirconia is generally applied for solid state fuel cell (SOFC) system. However, the power efficiency of SOFC system would significantly hindered due the presence of interface leaking accompanied with metallic phases or thermal residual stress at metal-ceramic bonding. In this research, the interfacial reactions for different temperature and period annealed sandwich of stainless steel (316L), Ti-Ni-Ti multi-foils (TNT), and 8Y-zirconia (8Y) are systemically investigated using XRD, SEM/BEI, and TEM/EDS. Structural information indicating that the presence of meta-stabled (Fe,Ni)Ti + β-Ti phases upon (Ni,Fe)Ti2 to (Fe,Ni)Ti phase transformation at 316L-Ti side. In addition, at 1250°C, the Ti2O3 and TiO phases would precipitate in the matrix of γ-(Fe,Ni),Fe2Ti and TiNi3 mixtures. These information might capable of deriving the high temperature microstructure evolution mechanisms of metal-foil-(yttria doped ZrO2) sandwich and is to our knowledge for the very first time demonstrated on 316L/TNT/8Y system for SOFC applications.