Titan's atmosphere vs temperature.

[tanzanos]

I was wondering at what temperature would Titan's atmospheric particles reach escape velocity? Since Titan lacks the mass to hold onto its present atmosphere then would I be wrong to conclude that what holds such a thick atmosphere is the extremely low temperatures found on Titan?

 

[mfb]

The escape velocity is 2.6km/s, at ~100K a typical energy for nitrogen is ~240m/s, a factor of 10 below the escape velocity. In terms of energy, this is a factor of 100, that's fine.
The temperature would have to be significantly higher to get large losses.