Quote Originally Posted by Tenson View Post
Z travel 1 meter on a moving gantry? I can't imagine it milling steel let alone titanium.

Get some drawings down then post them up for better advice.
Totally agree with your statement, especially if it needs to also be transportable in a back of a transit.
To machine titanium, steel or stainless, the machine needs to be extremely rigid and 5mm box section is not even close to getting to a point where it could accurately cut.
1M of Z would make the machine flex like a rubber dildo if you tried to cut steel, let alone titanium.