i don't think either the aluminum or the stainless tip will get hot. i only have stainless tips because i don't want to put aluminum in my mouth, but i doubt the fact my ss tips never get hot has anything to do with heat dissipation (or conversely, the fact that stainless is a poorer conductor of heat in the first place). the science may or may not come into play with a 306 tip, but one that sits at the end of the sleeve on a 510, 901, or 801 is not going to get warm.
Just adding to this: If the T Tip does get really warm, that's a clear indicator that the atty is way too hot to keep on vaping and the unit should be laid down to let cool off. As we know, letting the atty get really hot is not good for its longevity.


