To maximize your strength to weight ratio
alloys are a base metal with a little of a similar metal mixed into it to make them harder for everyday use and are used for structual purposes such as building
There are many more than two types of metal alloys. There are aluminum alloys, titanium alloys, magnesium, iron (steel); there are alloys of pretty much any metal out there
No. The are many metal-metal alloys. Stainless steel and brass for instance.
Yes, it is correct.
Alloys can add strength to a metal
Alloys can help neutralize unwanted properties of a metal
Usually because alloys are stronger or otherwise have better properties in one way or another.
Alloys can help to eliminate undesired elements in a base metal
alloys are probably cheaper to make and stonger then an element or a simple metal. Alloys are easier to make. It is difficult to find a simple metal.
Alloys can add heat resistance to a metal
Alloys
no, because it is a non-metal and only metals can form alloys