This　study　aimed　to　improve　Ti-porcelain　bonding　strength　through　SiO2　modifications.　Wax　patterns　were　coated　with　SiO2　mixed　with　tetraethoxy　silane　(group　C),　patterns　without　coating　were　used　as　controls　and　subdivided　into　sandblasting　group　(group　S)　and　polishing　group　(group　P).　Casting　surfaces　were　analyzed　with　XRD,　while　Ti-ceramic　interfaces　were　characterized　using　SEM/EDS.　Metal-ceramic　specimens　were　tested　in　three　point　bending,　and　characterizations　were　also　analyzed　with　SEM/EDS　of　porcelain　debonding　surfaces.　In　group　C,　SiO2　and　Ti5Si3　phases　were　observed;　SEM　micrograph　showed　that　Ti-porcelain　had　a　compacted　interface,　and　EDS　maps　of　the　interface　illustrated　the　diffusion　of　Si,　Al,　and　Sn　to　Ti,　and　cohesive　fracture　within　the　bonding　agent.　The　bond　strength　of　group　C　was　39.04　+/-　5.0　MPa,　which　was　15%　higher　than　that　of　group　S　and　32%　higher　than　that　of　group　P.　SiO2　coating　could　improve　Ti-porcelain　bond　strength.