Three　different　microstructures　with　line　pattern,　grid　pattern,　and　spot　pattern　were　fabricated　on　titanium　surfaces　by　nanosecond　laser.　Scanning　electron　microscopy　(SEM),　contact　angle　measurement,　surface　roughness　gage,　and　X-ray　photoelectron　spectroscopy　(XPS)　analyses　were　used　to　characterize　and　measure　the　surface　morphology,　contact　angle,　surface　roughness,　and　chemical　composition　of　titanium　after　laser　processing.　The　results　indicate　that　the　contact　angle　of　titanium　surface　is　77.8A　degrees　immediately　after　laser　processing,　which　shows　hydrophilicity,　and　the　contact　angle　presents　a　rising　tendency　with　time　in　general.　At　steady　state,　the　maximum　contact　angles　for　line　pattern,　grid　pattern,　and　spot　pattern　increased　to　157.2A　degrees,　153A　degrees,　and　132.5A　degrees,　respectively.　It　can　be　found　that　the　surface　wettability　has　changed　from　hydrophilicity　to　hydrophobicity　and　even　to　superhydrophobicity.　The　influence　of　surface　morphology　on　the　surface　wettability　effects　immediately　after　laser　treatment　and　does　not　change　with　time,　while　the　effect　of　surface　chemical　composition　on　the　surface　wettability　will　continue　from　the　beginning　of　laser　processing　to　the　stabilization　of　surface　chemical　composition.　Finally,　it　can　be　deduced　that　the　accumulation　of　carbon　on　the　surface　is　probably　the　critical　factor　to　improve　the　surface　hydrophobicity.　Therefore,　it　is　concluded　that　laser-induced　modification　of　surface　wettability　correlates　with　surface　morphology　and　surface　chemical　composition.