Apple already did Titanium laptops in 2001. It was way ahead of its time.But not as ugly and near impossible to remove scratches on an Ali clamshell let alone dents on the corners
The MS fabric is remarkable resilient to stains and can be cleaned
Titanium excels in tensile strength over Ali but you will need some clever 3D printing or CNC work to get back the cross sectional area, otherwise it will easily bend if you rely on using less material to match the Ali weight.

PowerBook G4 - Wikipedia
Look's a lot better than 2021 MBP.