Commercially pure titanium (CP-Ti) plates were friction stir processed (FSPed) using a welding tool with a tungsten carbide (WC) pin. The current study, which is part of a broader research project, focuses on the microstructure and the mechanical properties at room temperature as well as on the metallurgical processes occurring during the creep of FSPed CP-Ti at the temperature range of 550-650⁰C. The tensile properties and the hardness of the FSPed material at room temperature were found to be superior to those of the parent material. As for high temperature properties – the FSPed material showed improved creep resistance compared to that of the parent material. Transmission electron microscopy (TEM) study carried out on both parent material and FSPed material revealed the presence of nano-sized grains in the FSPed material due to dynamic recrystallization (DRX) occurring during the processing stage. Fractography and TEM studies carried out on broken crept specimens will be presented as well. The technological implication of the current study is that the FSP of CP-Ti yielded an improved microstructure at high temperatures as well as at room temperature.