Born in TA 2900, Tíli settled in the Blue Mountains with many Dwarves that survived the terrible sacking at Erebor twenty years ago. She first met Fíli in the beginning of TA 2930 and eventually got married. Nine months after their marriage, she gave birth to two twin daughters. While Fíli and his brother Kíli joined their uncle's company to reclaim Erebor from the dragon Smaug, Tíli looked after her daughters. After hearing the news of Smaug's death, Tíli, along with her daughters and large group of Dwarven Refugees began to resettle in the Lonely Mountain.