The　corrosion　behaviors　of　the　Ti-based　bulk　metallic　glasses　(Zr30.88Ti33.57Cu7Ni5.39Be23.16)　as　well　as　the　in-situ　Ti-based　bulk　metallic　glass　matrix　composites　(Zr28.92Ti42.22Cu6.57Nb6Be16.29)　in　0.6　mol/L　NaCI,　1　mol/L　HCI　and　0.5　mol/L　H2SO4　solutions　were　analyzed.　The　potentiodynamic　polarization　analyses　indicated　a　drastic　increase　in　the　current　densities　for　all　specimens　in　the　NaCI　and　HCI　solutions,　which　could　be　related　to　the　passive　breakdown　caused　by　pitting　corrosion.　In　contrast,　no　active-passive　transition　existed　in　the　H2SO4　solution.　SEM　and　EDS　analyses　were　performed　to　clarify　the　morphologies　and　chemical　states　of　the　elements　prior　to　and　following　electrochemical　testing.　The　results　demonstrated　that　both　alloys　exhibited　entirely　different　corrosion　behaviors　in　the　chloride-containing　and　chloride-free　solutions.　The　surfaces　of　the　samples　were　locally　damaged　by　a　chloride-induced　pitting　process.　Specifically　for　the　composites,　a　selective　dissolution　occurred.　In　contrast,　a　low　portion　of　corrosion　occurred　within　the　chloride-free　media.　The　chemical　compositions　were　identified　as　the　main　factor　to　affect　the　corrosion　performance　of　the　alloys.　(C)　2018　Elsevier　B.V.　All　rights　reserved.