A title is a form of address appropriate to the rank of a particular person.
- A person without a title is addressed as "my lord" or "my lady" in the SCA
- A Lady as Lady
- A Lord as Lord
- A Knight is addressed as Sir ( Some female knights prefer Dame )
- A Laurel, Pelican or Master of arms is addressed as Master or Mistress in the SCA
- A Viscount, Viscountess, Count or Countess as Your Excellency
- A Duke or Duchess as Your Grace
- A Prince or Princess as Your Highness
- A King or Queen as Your Majesty
Note also that medieval English kings were addressed as "Your Grace". "Your Majesty" is found in letters to King Henry VIII after about the time he broke with the Church of Rome (watch the gradual transition from "your grace" to "your highness" and "your majesty" in the letters addressed to Henry by his wives and daughters at http://englishhistory.net/tudor/letters.html). If you have examples of the use of "Your Majesty" before this time, please cite them here.