Google has detailed what is so special about the new Titan M custom silicon it has baked into the Pixel 3 to help secure the device. In its latest blog post since the official launch of the device, Google has identified four key areas where the new chip will protect users from attacks.
https://www.notebookcheck.net/Google-details-Titan-M-custom-security-chip-in-Pixel-3.338866.0.html