Aluminum
warm,lightweight,cheap.
Steel
aluminum
The most lightweight is aluminium but they are seldom the most expensive.
Aluminium is cheap, lightweight, strong, highly malleable and corrosion resistive. Hence it has all the qualities required to make a utensil out of it.
cause its cheap, easy to mold, and lightweight.
Because it is cheap and lightweight.
All of those qualities are relative. Aluminum is a good start. For formed sheet metal, type 5052-H32 is pretty common.
It's light enough, cheap enough, strong enough and easy enough to work with.
It is cheap, it is strong, it is reliable, it is versatile and it is simple and easy to use. In short, there is the perfect building material.
aluminum is light, strong and inexpensive. Not all airplanes use aluminum though. Wood is used on some, as is carbon fiber and composite materials. Aluminum is probably the most common though.
No but it is strong.