There are plenty of other materials that make far more sense than metal for a internal antenna communications application. I can't tell if you are serious here so not really worth responding.
Who's talking about internal antenna communications here?
Cmon man... dial down the techie for juuuuust a second, and dial up the common sense. Do I
really need to spell this out for you?
• Aluminum is more sturdy than plastic, however it's a notoriously weak metal.
• Many people perceive aluminum cased phones as super strong / somewhat indestructible because they're "metal".
• Despite the added strength/rigidity over plastic, this "super strong" perception is a fallacy
Therefore my statement "Despite being made of aluminum" the phones can be damaged by substantial force.