When a body disintegrates, it does not necessarily disintegrate into two fragments; it may disintegrate into two, three or countless fragments.

The explosion of a firework, for example, implies its disintegration into many fragments. Can the fragments have any direction and speed? Well, almost; the conservation of linear momentum limits the possibilities of, at least, one of them. 

In the following visual, we see the laws that govern the separation of a body into three fragments, but the conclusions that we will arrive at may be generally valid.