The book will aim to discuss about tungsten (W) based oxide dispersion strengthened (ODS) alloys produced through mechanical alloying with different consolidation technique. Conventional armaments is been designed and developed globally from long past. Self-reliance is of immense importance in modern warfare, which leads to develop new technologies and novel materials for advanced defense weapons. In an effort to facilitate greater access to advanced technology products fabrication of armaments alloys with more improved properties are of immense importance. Apart from armanent sector areas such as extremely high wear resistant materials, nuclear reactors are potential area of applications of W based ODS alloys.Tungsten is a potential candidate for applications in defence, nuclear sectors as it possess high melting point and excellent mechanical strength at elevated temperature, highest density and hardness, high tensile elastic modulus. Addition of Oxides will improve the mechanical properties to two to three manifold which is desired demand of the sectors. Some research work has been carried out in ODS steel whereas research work in tungsten based ODS alloys is limited.