參考資訊：
https://unofficialtwrp.com/twrp-3-3-1-root-unihertz-titan/
步驟如下：
1. 下載https://github.com/steward-fu/website/releases/download/titan/331.Unihertz.Titan.rar
2. 下載https://github.com/steward-fu/website/releases/download/titan/Magisk-v21.4.zip
3. 開啟開發人員選項
4. Settings => System => Advanced => Developer Options => OEM unlocking
5. 執行如下命令：
$ adb reboot bootloader $ fastboot flashing unlock $ fastboot reboot
6. 資料會全部被清除
7. 開啟開發人員選項
8. Settings => System => Advanced => Developer Options => OEM unlocking
9. 執行如下命令：
$ adb reboot bootloader $ fastboot flash recovery recovery.img $ fastboot reboot recovery
10. 在TWRP裡，Advanced => ADB Sideload
11. 執行如下命令：
$ adb sideload Magisk-v21.4.zip