Thats a rather pointless bit of information, for start you only need one, but for second it doesnt give any idea of the kind of motion you are achieving which is whats really needed.

For example, you could say that the entire saw mechanism is hinged at either the top or the bottom and the other end is connected to a linear actuator, this is inside the body with a narrow slit in the armour next to it so when the actuator pushes forward the blade is pushed through the slot.

However, I dont really think the weight of any such mechanism is really worth the effort for a saw. Personally I dont rate saws - they arent goign to do anything to titanium, and they certainly arent going to do anything to hardox, infact the damage they do against aluminium even is goign to be minimal - personally Id consider scrapping the saw entirely and usign the extra weight elsewhere.