Fast production. Or precision finish. Pick by priority.

Yes, but with considerations. Aluminum MIG (often called "push-pull" MIG with special wire feed) works well for aluminum 3 mm and thicker. For thinner aluminum, TIG is preferred due to better heat control. For production aluminum welding (truck trailers, EV battery trays), aluminum MIG is standard and fast. For aerospace or cosmetic aluminum, TIG is the default choice.

For thin sections, non-ferrous metals, and cosmetic welds — yes. For structural steel where appearance doesn't matter — MIG is equally strong if welder is skilled. Both can achieve full weld strength when performed correctly. TIG advantages: less spatter, better appearance, more heat control. MIG advantages: faster, easier, less expensive. Quality is equivalent for structural purposes; TIG wins on appearance and precision.

TIG is the default for stainless. Why: stainless's reactive surface benefits from TIG's clean, low-contamination weld, especially for sanitary applications (food, pharma, medical) where interior weld smoothness matters. MIG stainless is possible for structural, but cross-contamination and spatter make it less common. For sanitary welds with Ra 0.4 µm interior requirement, TIG is mandatory.

TIG requires more skill. TIG welder must coordinate: torch position, filler rod feed, foot pedal amperage control, gas coverage — all simultaneously. Years of practice required. MIG welder manages: torch position and travel speed, with wire feed automatic. Easier to learn and perform consistently. For production hiring, MIG welders are more available. For specialty work, TIG welders command higher rates.

MIG: roughly $2–5 per linear foot of steel weld (typical). TIG: $6–12 per linear foot for steel, $8–15 per linear foot for aluminum. TIG is 2–3× more expensive per length due to slower travel speed and higher operator skill. For large production welding runs, the MIG premium pays off. For specialty or cosmetic work, TIG is the only appropriate choice despite higher cost.

Laser welding is becoming increasingly common for production (especially thin section and EV battery pack welding). Advantages: minimal distortion, very narrow weld, fast, automated. Disadvantages: expensive equipment, requires precise fit-up. For production thin-section (< 3 mm) welding at high volume, laser welding often wins vs both MIG and TIG. For prototypes or one-off welds, MIG and TIG remain the practical choices.