This paper reviewed progress of research in the field of titanium armors all around the world to deepen our understanding and drive the application of titanium armors, especially the application and further investigation of titanium armors. The science and engineering of titanium armors, included ballistic performance and failure mechanism of titanium armors, ballistic performance of monolithic and constitutive part of titanium alloy in armor configurations, fundamental science research of titanium armors; ballistic performance and armor plates standardization, included method on evaluation of ballistic performance, the index and database of ballistic impact properties, standard of titanium plates in armor application lay down; Finally, the recent application of titanium armors was reported and further investigation was discussed.