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Depends if oversize thinwall etc.

My Vitus spread like butter but pretty thick walled narrow gauge stays. Super soft.

Aluminium is very ductile. Just when highly stressed eg. Cokecan thin, prone to cracking.

Also depends on mix as usually an alloy of.

No way my scandium Mash would allow 130 eg. Stiff as a board and stressed accordingly.

Alu and a lot of its Alloys are crystalline i.e. brittle. Hence the thought that frames are 'harsh' or 'stiff', no?