The only metal I'd trust to run TC on a smok mod (they aren't exactly known for accuracy) would be stainless steel (can also be run in wattage mode). Nickel can melt if run incorrectly or inaccurately especially with a high wattage ramp up and titanium can give off undesirable byproducts into your vape.
I will say... I think Letitia's correct, and you've got a build that is so low resistance, your mod can't fire it or possibly even READ it, it's just not going to fire.
If you don't have an ohm's reader, get one. I don't think you need (to start) to go any lower than 0.4 or 0.3 with your RTA. If you are unfamiliar with steam-engine.org, you might want to start using it, it can tell you (based on wire type and measurements you input, e.g. coil diameter, lengths of legs, dual or single build etc.) how to target a more reasonable resistance. You could, for example choose to run ONE exotic coil (that should double your resistance) or a more simple round wire build at a higher resistance.
Do not try to run kanthal in TC, unless you have a Hohm Tech mod and even then I might be wary.
Also, I'd try wattage mode for now. Once you have things running nicely, then you can look at TC, as you know what types of "wattage" your builds "require" as a start-up wattage for TC. It's the reason I most often use stainless steel, can switch over quite easily.
Many "exotic" builds cannot be run in TC, but without knowing what wire types you have, I couldn't say.
Good luck, keep asking questions until it becomes clear.
Anna
