Titanium is a powerful and uplifting song by Sia that talks about resilience and inner strength. The metaphor of being 'titanium' is used to describe the unbreakable spirit of the person, showcasing the ability to withstand and recover from any adversity. Key themes include empowerment, self-worth, and overcoming challenges. Particularly poignant moments in the song are found in the chorus with the lines 'I'm bulletproof, nothing to lose, fire away, fire away,' which emphasize the sense of invulnerability and strength.