This is the Titanium stable release 5.24 ROM image. It is suitable for the Rapido Ti, TiMachine, plus other Titanium based computers.
It can be programmed into your Titanium board by means of the FlashQSPI utility included in the archive.
You will also need the RISC OS 5.24 (stable) HardDisc4 image, available from the Miscellaneous downloads page.
Please see the Resources tab of this page at the Elesar website to check if there are any patches you need to apply to the RISC OS 5.24 ROM.