Fracture　and　deformation　characteristics　of　the　Ti-based　metallic　glass　matrix　composite　have　been　studied　by　the　tensile　test　and　the　in　situ　TEM　tension　test.　Typically,　the　composite　exhibits　the　high　strength　and　considerable　plasticity.　Microscopically,　it　was　found　that　shear　deformation　zone　formed　at　the　crack　tip　in　glass　phase,　which　can　bring　about　quick　propagation　of　shear　bands.　However,　the　plastic　deformation　zone　nearby　the　crack　tip　in　dendrites　will　postpone　or　retard　the　crack　extension　by　dislocations.　The　attributions　of　micro-deformations　to　mechanical　properties　of　composites　were　discussed.