it's correct name is Smilodon, but saber-toothed cats have been called saber-toothed tigers despite the fact that they aren't closely related.
Because they had long canine teeth like sabers (a curved sword). They were properly "cats", not tigers, and the precise name is Smilodon.
Its Mate, like all animals.
Yes, although the term is loosely used to describe a collection of different species.
The real scientific name for sabertoothed tigers of all ages was smilodon.
Saber Toothed Tigers were endangered but they are extinct now.