why didn't vision become intangible when thanos caught him as we know becoming intangible is an ability that vision was shown to have and used in some battles but then why didn't he use it to get away from thanos and not have the stone taken from him well if you remember the scene right after wanda and bishon are attacked by corvus and proxima midnight vision explains that corvus blade prevented him from using this ability this means that vishen's system can be attacked to the point of blocking some of his powers and throughout the movie he was
seen to be very tired so perhaps he was still too weak to do it with thanos although let's take the following into account if vision managed to turn intangible what could he do next thanos already had five stones and in fact he proved against bruce banner that one of them can make other objects intangible so maybe he could also block visions and tangibility at this point there was little the avengers could do to stop thanos from getting the mind stone