The　damage　tolerance　titanium　alloys,　such　as　Ti-6Al-4V　ELI,　TC4-DT,　TC21　and　TA15　ELI　alloys,　were　summarized.　The　development　process　and　the　new　study　of　damage　tolerance　titanium　alloy　were　introduced.　It　pointed　out　that　Ti-6Al-4V　ELI　alloy　was　successfully　used　in　the　airplane　manufacture　industry　in　foreign　countries.　However,　TC4-DT,　TC21　and　TA15　ELI　alloys　were　still　under　research　in　our　country.　The　fracture　toughness　and　fatigue　crack　propagation　rate　properties　of　TC4-DT,　TC21　and　TA15　ELI　alloys　were　importantly　discussed　in　detail.　The　lamellar　microstructure　was　beneficial　to　improve　the　damage　tolerance　properties　of　titanium　alloys.