melt - mill
- middlings tube
- Midland-Ross process
- midposition of boundary rays
- midrib
- midrib plane
- Mig
- MIG weld
- migra iron
- migration of interstitial impurities
- migration of lattice vacancies
- Miguet furnace
- mild
- mild abrasives
- mild pickle
- mild reducing agent
- mild steel
- mild steel ingot
- mild steel plate
- mild steel sheet
- mill