which is more durable, metal or non-metal?

Answer 1

It depends what you mean by "durable", and it also depends on what type of metal, and what type of non-metal. You've left the question very open-ended, so I'll explain in broad terms.

Fiber/resin composite materials are stronger for their weight than most metals, but they tend to be very stiff.

If you needed the material to flex (as it would in a coil spring), metal is better, because composites are too stiff.

If you need the material to resist saltwater or acid, composites are better than metals.

If you need the material to conduct electricity, metals are much better than composites.

If you need the material to conduct heat efficiently, metal (especially aluminum) is much better than composites.

Answer 2

Alloys (metals mixed with other elements, such as carbon) is usually stronger and more durable than metals. Metals react differently to all kinds of abuse, for instance when heated, cooled down, hit or bent. Special alloys are made to withstand these treatments, and depending on its 'ingredients', it gets stronger than its seperate parts.
It is almost like a good friendship or relationship: one person can be pretty tough, but when you put two people together they are usually much stronger.

Answer 3

durability depends upon the characteristics of the object u r choosing for .like in case of metals if u choose iron,aluminium etc.
they will be more durable but if u choose sodium potassium they will dissolve soon likewise in case of non metals plastic is highly durable but if u take wood it will fade soon
so u better see the characteristics to get the durability