Aluminum suffers from fatigue failure. Some of the Beech D-18 and Bonanza
spars failed from fatigue.

It also suffers from corrosion. I recall an Ercoupe that lost a wingspar
because mouse urine had corroded it.

Glues have been used to make violins for centuries and I have never heard of
one coming apart. But, they are not left outside for 40 years, either. The
stresses caused by the string tension may be as high as that caused by wave
flying.

It is possible to pull the wings off almost any ship.

Colin