Titurin is a specific, traditional act of latmiya (ritual chest beating) performed on the 10th of Muharram (Ashura) , the day commemorating the martyrdom of Imam Hussain (the grandson of Prophet Muhammad) and his companions at the Battle of Karbala (680 CE).
If you plan to participate (as a Muslim or invited guest), wear dark, loose trousers (tight jeans make the slap painful), keep your rhythm with the row, and focus on the meaning: lamenting justice defeated by tyranny. titurin