The curing temperature is 175C, and that's where the problems start.
Aluminium and titanium expand at different rates when they heat up.
The coefficient of linear expansion is a measure of how much: for aluminium it's about 22 (x10^-6m/mK, but don't worry too much about the units). For titanium it's about 9.
That means that if you heat a 1-metre-long piece of aluminium up to 175C, it will grow by about 3.5mm.
A 1-metre-long piece of titanium will only grow by 1.4mm.
If the two metals are joined together when you heat them up, then the combination will bend, a lot.