Every character on Jiǎoluò Shūwū read as ti in any tone — 2 readings total across the four tones. Pick the tone you mean.
If you have the sound ti but not the character, here are the 2 characters read this way: 题 (tí, topic, question, problem, to inscribe), 体 (tǐ, body, substance, to experience). They split across 2 tones, so the tone is what separates them.