creative writing - Chapter titles or numbers?

I am about to start writing a science-fiction novel, and having only ever written technical documents before, I have very little experience in the finer details of creative writing. In particular, I was wondering Do chapters always need a title or is acceptable to have Chapter 1, Chapter 2, etc... with no title?

Thanks,

Answer

Chapters don't need to have a title. "Chapter NN" is fine.

Or you can have only a title — that's generally when the title identifies some kind of shift, like a different time, location, or narrator/POV focus.

So you can have

Chapter 1

Chapter 6

Chapter 47

or

Location:

Vulcan, 2265

POV:

Brienne

Time:

A few hours later