the Titans got there name because Nashville, Tennessee is known as the Athens of the South because there is an exact replica of the Parthenon which was built in Athens, Greece. Titans were very powerful figures in Greek mythology. Titans...Greek mythology...Athens, Greece...Athens of the South...Nashville, Tennessee... so it was only appropriate Tennessee Titans.
Here is the history of the teams logo
Here is the history of the teams logo
Old (Used to be the Huston Oilers)
New