Rubber and metal can't form an 'alloy'. You can powder the metal, then mix it with a variety of hydrocarbon compounds, like the flexible rubber magnets on the fridge, but a true alloy just ain't possible.
I've seen 'memory-metal', though. Wierd stuff.................FRegards
Well, it was a brief article in either Popular Science or Mechanics. From what they describe, it has exactly the same characteristics described by Jesse Martel's son, who saw it in Roswell in 1947 : cigarette can't burn a hole thru it, can't cut it with scissors, wad it up like tinfoil and it doesn't crease, it just springs back to flat. Obviously no HUMAN was making this "memory metal"/rubber-metal alloy in 1947; ergo, it's alien technology, used by them for millenia. There is far more that we've discovered but I can't tell you about it here...