The best replacement for soldering is welding.

The best alternatives to soldering are rated as following:
★★★★★  welding
★★★★  brazing
★★★★  crimping
★  wire nuts
★  compression fittings
★  soldering
★  fusing
★  wave soldering
★  reflow soldering
★  sharkbite fittings
  sharkbite
  brazing copper pipe
  crimping wires
  shark bite
  spot welding
  jb weld
  crimping wire

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

Other search terms related to soldering and their ratings are:
★★★★★ copper
★★★ water in pipe
using flux
You have in mind a companion for soldering and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of soldering in all years. Click on graph for more.
soldering
welding
brazing