Easiest and safest way to tame this is to lure it under water. They stop aggro and you can tame as you please. Just make sure you come up for air every once in a while. Also be sure the water is deep enough.

Don't wear any armor when around the arthropleura, because it melts any armor

Bye bye flak gear

ARK Community: Too bad a titan is basicly an expensive, end-game raid tame.

Arthropluera: Hold my beer

Full Ghillisuit, bug repellent, and balls of steel because these are scary to tame! They have the taming slot right behind their head about where the saddle would normally sit. Must approach from behind and only approach when feeding, stay away otherwise