Might be a little late, but here's my experience with folding massive (non-dibond) 2mm aluminium sheets for a custom extractor hood project, for this material to fold nicely i needed ~1.5mm deep v-grooves.
First i used a OF 1010 router with the Festool dibond router bit (i know, not made for the material - but it survived the several meters i did without any noticeable wear) on a FS rail, this worked ok but was slow since i did it in several passes.
Since i had quite some folds to make i turned to using a TS 55 REBQ with the TF52 blade in 45° setting on the rail. Because the blade is 2mm and i cut 1.5mm deep the resulting groove was nicely v-shaped and completed in a single quick pass - for the few sharper ~150° bends i needed i did another pass directly next to the first one, resulting in a maybe not a perfect completely filled corner but good enough for my purpose.
The only hazzle was the initial setup of exact cut depth with the screw on the knob (and some test cuts), only pitfall was to realize that the FS had to supported all the way by the material to be vertically completely straight or the cut wouldn't be the same depth all the way, so i supported the FS with remainders from the first cuts all the way.
Result was (compared to using the router) cleaner and way quicker, all folds folded nicely and without tear.
You might need to do a second cut from the other side (turning the FS) to get the V-shape right since your material is thicker so the blade won't cut both sides of the groove in one pass, but should you have a TS, FS and a TF52 blade at hand this could do the trick for you - at least for low volumes or samples.
Gregor