The job of a tire is to get you from point A to point B safely. Sometimes that does not happen, either because there is a tire blowout, separation or some rupture. To understand how that could happen, you have to understand how manufacturers built tires.
If you look closely at a tire, you can see the design of tires and how they sometimes might fail. For instance, if you look inside the tire, you could see what is called the interlock. That should be built in a certain way so that air does not escape from the casing, which could cause problems. According to Tire Safety, the next part of the tire is the tire carcass. It is the basic building block of the tire onto which other stuff holds.
On top of a tire are two steel belts. There is the first steel belt and a second steel belt. On top of that, in most well-constructed tires, you would find a nylon ply or some other kind of textile ply that lays over everything else and hold the casing together to keep it from failing. On top of the second steel belt, you find the tread.
Tires can fail in a lot of ways. Two of the more common forms are when the belts come apart or when the tread comes apart from the top strap. This is a belt to belt separation or a tread to belt separation. In a well built and well-designed tire, that should not happen. A tire should not fail in those ways. If it does it, there may be a product liability case against either the tire manufacturer or the tire seller.