The best replacement for wrought iron is cast iron.

The best alternatives to wrought iron are rated as following:
★★★★★  cast iron
★★  aluminum fence
★★  cast aluminum
★★  rod iron
★  aluminum fencing
★  mild steel
★  aluminum patio furniture
★  pig iron
  aluminum railings
  aluminum outdoor furniture
  wrought aluminum
  wood patio furniture
  wood spindles
  wrought aluminium
  cast aluminum furniture
  forged iron
  vinyl fence
  galvanized steel
  cast aluminum outdoor furniture
  tubular steel
  cast aluminum patio furniture
  aluminum patio sets

Your alternative for wrought iron is not listed? Suggest!
Speaking about wrought iron, one probably shouldn't forget about crystal chandeliers.

Other search terms related to wrought iron and their ratings are:

★★★★★ crystal chandeliers
★★★★ wood furniture
glass top
wood gates
crystal chandelier
You have in mind a companion for wrought iron and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of wrought iron in all years. Click on graph for more.
wrought iron
cast iron
aluminum fence