Ag-containing　TiO2　films　(Ag/Ti=3.3,　9.1　at%)　were　sol-gel　coated　on　NiTi　alloy　that　had　been　surface　roughened　by　the　NaOH-HCl　treatment　for　antibacterial　application.　Thermal　analyses　of　the　dried　gels　reveal　that　the　addition　of　9.1　at%　Ag　lowers　the　anatase-rutile　transformation　temperature　from　618　to　586　degrees　C.　Morphological　observation　shows　that　surface　roughening　and　silver　addition　improve　structural　integrity　of　the　TiO2　films.　X-ray　diffraction　reveals　that　the　addition　of　Ag　does　not　obviously　change　crystallinity　of　the　anatase　films.　X-ray　photoelectron　spectroscopy　results　indicate　metallic　nature　of　Ag　in　the　film　and　complete　coverage　of　the　films　on　the　roughened　alloy　substrate.　Microindentation　test　exhibits　that　the　Ag-TiO2　film　on　the　roughened　substrate　has　higher　cohesive　strength　than　that　on　the　polished　substrate.　The　potentiodynamic　polarization　test　in　a　Ca-free　Hank＇s　balanced　salt　solution　demonstrates　good　protection　of　the　TiO2　and　Ag-TiO2　films　for　the　alloy　substrate.　Ultraviolet　light　illumination　for　3　h　can　increase　surface　hydrophilicity　of　the　coated　NiTi　samples　by　reducing　contact　angles　from　＞　65　degrees　to　＜20　degrees.　(C)　2014　Elsevier　Ltd　and　Techna　Group　S.r.l.　All　rights　reserved.