The durability depends on quite a few things: the tightness of the weave; thickness/strength of the yarn & fabric; back-cloth composition and strength; and so on.
Essentially you need to look at the Martindale or Rub Test result for the specific fabric in question. Two silk velvets can be quite different.
As with all velvets a proper cleaning regime is important to extend the life of the fabric.
One of KOTHEA’s silk velvets has a rub test/Martindale of 25,000. This is more than adequate for general upholstery.