The　effects　of　TiO2-SiO2　sol-gel　coating　with　different　firing　temperatures　(300　degrees　C.　500　degrees　C,　and　750　degrees　C)　on　the　cpTi-porcelain　bond　strength　were　investigated　in　the　present　study.　Prior　to　applying　the　low-fusing　dental　titanium　porcelain,　the　phase,　surface　morphology,　surface　roughness　and　static　water　contact　angle　of　the　intermediate　layer　were　evaluated.　The　cpTi-　porcelain　bond　strength　was　measured　using　the　three-point　flexure　test　according　to　ISO　9693　standard.　Statistical　analyses　were　made　using　one-way　ANOVA　and　Dunnett-t　test.　Significantly　higher　bond　strength　of　TiO2-SiO2/750　degrees　C　(specimens　coated　with　TiO2-SiO2　sol-gel　coating　and　fired　at　750　degrees　C　for　1　h)　when　compared　to　the　control　group　was　observed　(p＜0.05).　No　ruffle　phase　was　found　in　all　the　tested　specimens　coated　with　TiO2-SiO2　sol-gel　coating.　The　surface　morphology　of　the　intermediate　layer　was　apparently　different　with　different　firing　temperatures.　It　was　found　that　the　static　water　contact　angle　of　TiO2-SiO2/750　degrees　C　significantly　decreased　(p＜0.05).　However,　no　markedly　different　R,,　of　TiO2-SiO2/500　degrees　C.　and　TiO2-SiO2/750　degrees　C　in　comparison　to　that　of　the　control　group　was　observed　(p＞.0.05).　The　results　show　that　the　TiO2-SiO2　sol-gel　coating　fired　at　750　degrees　C　for　1　It　can　notably　improve　the　cpTi-porcelain　bond　strength　and　may　be　suitable　for　clinical　use.　(C):　2011　Elsevier　B.V.　All　rights　reserved.