As I can remember, Titan has in it's orbit a ring of gas from it's own atmosphere. So even if part of it's atmosphere is going to space, Titan would be recovering it's own atmosphere spread in it's orbit. Is that correct? If Titan was denser, like Earth or Mars, better, if Titan was not an icy world, but a carbon world, certainly it's atmosphere would be even denser and hotter, maybe making life easier to evolve.
No, you are probably thinking of Enceladus. Which is spewing out water forming Saturns E ring. Titans atmosphere is not escaping at a significant rate.