Titan sits inside Saturn's magnetic field so it is protected from the Sun's solar wind; high speed particles that strip away gass molecules. If the Earth's magnetic field stopped, the Earth would resemble the moon because the Sun's solar wind particles would strip away the atmosphere, then the ocean would boil at low temperatures like 10°c and the water vapour would also be stripped away by the Sun's solar wind. All that would be left is dry rocks and sand. They would be bleached by all the radiation and turn a charcoal grey colour.
I often wonder if there was a way to cause the solar wind particles to crash into the moon instead of shooting over the surface and knocking off gass molecules. Perhaps the solar wind could become part of the moon's atmosphere. If the moon had protection from the high speed particles, it would grow an atmosphere very quickly because the gravity is very weak so the atmosphere would spread out more. Here on earth most of the atmosphere is crushed down close to the surface. The atmosphere of the moon would cause more meteors to colide with it because the bloated atmosphere would reach out very far above the surface like a giant fishing net. I'm not saying my thought is right, but it is just a thought.
Just a harmless thought to keep my mind in a happy place. 🙂
