Can you please give me date or circa of a Royal Ivory Adams plate Titian Ware hand painted Rd 459174?

The Royal Ivory Adams plate marked "Titian Ware" with the registration number Rd 459174 dates to around 1921, as registration numbers in the UK typically indicate the year of their registration. Adams was known for its fine hand-painted ceramics during the early 20th century. If you need more specific details, consider consulting a specialized ceramics reference or appraiser.