I cut 10mm aluminium plate on my mitre saw using a regular TCT cross-cut wood blade, just sprayed on a bit of WD40 before the cut. It was similar to cutting a very hard, close grain, wood except the aluminium was a little sticky feeling. I think a rip cutting blade would be better as it wouldn't stick so much as it cut. Anyway, I'd happily make cuts with a regular circular saw if didn't have a better option to hand, not sure I'd even go to the expense of getting a special blade unless I was going to do a lot of cuts.