I cannot count how much aluminum over the years I have cut with my Hitachi slide compound and a carbide blade that stayed on for a long time after using it to cut trim. No it did not trash the blade or dull it enough to make a bad cut, although the blade did eventually get dull over time but not from the aluminum in one sitting.
To answer the question, the saw I referred to above is my trim saw. It is used primarily on wood or MDF trim exclusively, with the exception of the need to cut aluminum on occasion. Aluminum stair balusters seems to be the most of what I come across as of late.
You need to be really careful when cutting. The cut off piece may move toward the spinning blade and throw it with terrible force. I reduce this problem by screwing a wood fence over the stock fence and cut it through to make a zero clearance fence. This way the loose piece will not roll or move to be thrown by the blade.
Regarding tooth count, a finer tooth blade is better, but I have used general purpose 24 tooth blades to cut aluminum. The cut needs to be made slowly, and the finished piece held firmly or clamped in. I usually hold it, although small pieces that put my fingers unreasonably close to the blade, I have used a clamp.