Friction Stir Processing (FSP) is a proven technique for the fabrication of Metal Matrix Composites. It is shined in these recent years for its enormously improving capabilities of surfaces of different materials. As Carbon Nanotubes (CNTs) hold excellent mechanical, thermal, and electrical traits, they have become a boon as reinforcements to improve the properties of the materials. Reinforcing CNTs into the materials using FSP exceptionally increases the properties of different materials. This article reviews the CNT's reinforcement with metals such as Aluminum, Magnesium, Copper, and few other alloys by exploring the latest tendencies and techniques employed to manufacture the particulate metal matrix composites, to improve friction stir process efficiency. Moreover, notable microstructural features and mechanical properties are also discussed. The article concludes with the conclusion drawn from the literature and future work that needs consideration is also mentioned.