It's all a matter of style and consistency. Some choose to capitalize only the first word, e.g. (using your example) The title of this question. Others capitalize the key parts of speech in the title, excluding conjunctions, prepositions, and the like: The Title of T/this Question. In some cases, all the words in the title are capitalized:
How to Reply to Confirm an Interview. When confirming a job interview, type a one-page letter thanking the interviewer for the invitation to the job interview. Confirm the exact time, date and location of the interview to avoid arriving at the wrong location on the wrong day or time. Send the letter within 24 to 48 hours of receiving the invitation. (Creatas Images/Creatas/Getty Images)
Using a Confirmation Code. When you submit a request to confirm your email address, eBay will send you a confirmation email to your new email address. Open your confirmation email and follow the instructions. If you've done this but nothing happens, please follow these steps: 1  Find your confirmation code near the bottom of the confirmation email. 2  Enter your confirmation code in the specified box (if it isn't already entered for you).