MIG vs TIG vs Stick Welding: Which Process Fits Your Work?

MIG vs TIG welding comes down to speed versus control. MIG feeds wire from a spool and is the easiest process to learn, per Miller. TIG uses a tungsten electrode and hand-fed filler for precise, slower work. Stick uses a flux-coated rod and handles drafty outdoor jobs and rusty metal. Your pick depends on your metal, its thickness, where you weld and how much time you have to learn.

MIG vs TIG Welding at a Glance, Plus Stick and Flux-Core

Here are all four processes side by side. Whichever one you pick, your welding gloves and lens shade should change with it. We'll cover that gear after the process breakdowns.

The "Also called" names are what you'll see on machine, wire and rod labels, so a spec sheet that says GMAW is talking about MIG. Much of this table draws on Miller's first-welder guide.

MIG Welding (GMAW): Fast and Approachable

With MIG, the machine feeds a wire electrode from a spool automatically. You aim the gun and travel. There's no rod to swap and no filler to feed with your other hand.

Shielding gas from a cylinder protects the weld. Argon, CO2 and argon/CO2 mixes are common.

Miller describes MIG as the easiest process to learn, with high welding speeds. It also:

• Works on thin or thick metal
• Makes clean welds on steel, aluminum and stainless
• Leaves no slag to chip off

That speed adds up on fabrication work with a lot of seams.

The catch is the gas shield. Self-shielded flux-cored wire is more tolerant of wind, contaminants and outdoor conditions than traditional MIG. A breezy job site or a rusty trailer frame works against MIG, while a clean bench in a closed shop plays to its strengths.

If you're welding sheet metal or fabricating indoors on clean steel, MIG is a strong place to start.

TIG Welding (GTAW): Precision at a Slower Pace

TIG uses a non-consumable tungsten electrode. The tungsten carries the arc, and you add filler separately, by hand, into the puddle. A foot or hand control lets you adjust heat mid-weld.

Argon works for all TIG applications, and helium is the other shielding gas you'll see. For current, run AC for aluminum and DCEN for steel.

TIG handles alloy steel, stainless and nonferrous metals such as aluminum, magnesium and copper alloys. It's most commonly used to join thin sections.

Running the torch, the filler and sometimes a pedal at once takes practice. That same coordination is where TIG's control comes from.

Miller says TIG gives the highest-quality, most precise welds, but it's harder to master and significantly slower. It also asks more of your setup:

• Grease, oil and moisture on the base metal or filler cause porosity, so clean first
• TIG is sensitive to wind, which makes it a better fit indoors

If appearance and control on thin stainless or aluminum matter more than speed, TIG fits.

Stick Welding (SMAW): Outdoors and on Imperfect Metal

Stick doesn't use a gas cylinder. The flux coating on the rod releases shielding gas that protects the weld pool, then forms slag that protects the finished weld from oxidation.

No bottle to haul means less to load, which helps when the job is a pasture gate or a trailer hitch.

Where stick does well:

• Works indoors, outdoors and in drafty areas
• Bonds well on rusty or dirty metal
• Suits metal 1/16 in or thicker

Where it asks more of you:

• You'll change rods frequently
• It gives off significant spatter, and welds need cleaning
• Miller calls it more difficult to learn and use than MIG

Those limits vary by machine and electrode, so check the specs for your setup.

If you repair equipment or fence outdoors, stick is a practical fit.

Flux Core vs MIG: Same Machine, Different Process

Flux-cored welding is a wire-feed process similar to MIG. It runs on a wire feeder and the gun looks familiar, but it's its own process, called FCAW. The difference is inside the wire: it contains flux.

Think of it as MIG's wire feed paired with stick's flux shielding. You'll chip slag the way you do with stick, without stopping to change rods.

It comes in two types:

• Self-shielded: needs no external shielding gas and is more tolerant of wind, contaminants and outdoor conditions than traditional MIG
• Gas-shielded: uses shielding gas too, and isn't typically recommended for beginners and hobbyists

Both types leave slag. Watch polarity too: self-shielded wire typically runs DCEN, but check the wire's label before you set up.

Flux-core also gives deep penetration on thick sections and a high deposition rate. Miller's flux-cored welding basics covers the process in more detail.

If you weld outside or on dirty steel and want to stay with a wire feeder, self-shielded flux-core is worth a look.

When to Use MIG vs TIG vs Stick

Rather than settle TIG vs MIG welding in general terms, start with the job in front of you. This table matches common jobs to a process to look at first.

Two questions narrow it down fast. Will you weld inside or out? And how clean is the metal? Outdoors or rusty steel points toward stick or self-shielded flux-core. Indoors on clean metal opens up MIG and TIG.

You may end up using more than one process as your projects change. When you weigh a MIG welder vs TIG, base the choice on the jobs you'll run most often.

A Quick Way to Think About Thickness and Amperage

Miller's rule of thumb is about 1 amp of output per 0.001 in of thickness, so 0.125 in material needs roughly 125 amps. Treat it as a starting point, since the amperage you need varies by process and joint.

Duty cycle sets how long you can weld at a given output. In Miller's example, a machine rated at 30% duty cycle at 215 amps can weld 3 minutes, then must rest 7, in each 10-minute period.

What Changes in Your Gear When You Switch Processes

Switching processes changes more than the machine. Your lens shade, gloves and skin coverage all shift with it.

OSHA rules bind employers; if you weld at home, treat them as recognized best practice. On the job, your employer's hazard assessment decides the PPE the work requires.

Lens Shade

The full table is in OSHA 1910.133. In the same 60 to 160 amp range, MIG and flux-core call for a darker minimum than stick.

OSHA's rule of thumb for picking a shade: start with one too dark to see the weld zone, then go lighter until you can see clearly, without dropping below the minimum.

Gloves

Glove guidance from the American Welding Society (AWS) lines up by process:

• TIG or low-amperage work: a tight-fitting goat, deer or sheepskin glove. Browse TIG welding gloves.
• MIG, stick and air carbon arc: thick, insulated leather with melt-through and cut resistance. See MIG welding gloves and stick welding gloves.
• High-amperage flux-core or pulsed MIG: a heavier-duty glove.

If you run more than one process, you may want more than one pair. A glove picked for TIG feel is a different build from one picked for high-amperage flux-core.

Skin Coverage and UV

According to WorkSafe Victoria, an Australian safety regulator, MIG gives off the most radiation of the welding processes. Your setup changes your exposure too:

• Aluminum raises exposure compared with steel
• Argon raises it compared with helium or 100% CO2
• UV reflects off nearby hard, smooth surfaces

Keep your collar closed and your sleeves full length. Leather welding sleeves or an FR jacket cover your arms. For complete setups, see our glove and clothing picks by process, or work through the welding PPE checklist from head to toe.

MIG vs TIG FAQ

If you're switching processes or setting up for your first, start with our glove and clothing picks for each process.