I'd probably go with titanium as it's much more forgiving to torque yet still very light.
When torque is applied to Aluminum poles they bend and carbon shatters but titanium will revert back into it's original shape afterward.
Ti poles will likely run you about the same as carbon would.
If you use trekking poles that's definitely the way to go though.
Another consideration would be to use 4 guy lines and stakes to pull the hammocks apart. Would be lighter and cheaper but some people like to swing so maybe that's not ideal for you.
Last edited by jordo_99; 01-30-2013 at 12:33..