Gravity on Saturn's moon Titan is much weaker and the atmosphere is far denser than either Earth's or Mars's, which Starship seems to have been designed for. Could an unmanned starship do an Earth-Titan (and return?) tour nonetheless? Coming from interplanetary transit orbit, braking in Titan's atmosphere is probably much harder than in Mars's. Also, maximum aerodynamic pressure (Q-max) during restart might be more than in Earth's. On the plus side, one of the propellant components (liquid methane) is readily available on the surface, changing mass calculations.