The best replacement for carbide is titanium.

The best alternatives to carbide are rated as following:
★★★★★  titanium
★★★★★  cobalt
★★★★  hss
★★  tungsten carbide
★★  tungsten
★★  high speed steel
★★  aluminum oxide
★  ceramic sharpener
★  diamond drill bit
★  cobalt bits
★  carbide
★  ceramic sharpening stone
★  titanium drill bits
★  tool steel
★  ceramic
★  bi-metal
★  diamond burs
★  cobalt bit
  diamond drill bits
  titanium rings
  cobalt drill bit
  cobalt end mill
  tungsten steel
  t-alloy
  carbonide
  titanium ring
  titanium harder
  dow)
  zirconium carbide
  titanium bits
  diamond bit
  silicon carbide
  titanium nitride

Your alternative for carbide is not listed? Suggest!
Speaking about carbide, one probably shouldn't forget about cobalt.

Other search terms related to carbide and their ratings are:
★★★★★ cobalt
edm
You have in mind a companion for carbide and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of carbide in all years. Click on graph for more.
carbide
titanium
cobalt