If you want your popular posts titles to not be truncated then please make sure that the “Shorten title” option under Post Settings is unchecked.
Now, whether shortening titles is a good idea or not that completely depends on user preference. Do whatever feels right for your website.
I checked and they were all unchecked.
Ah, it’s not the title that’s being truncated, it’s the post excerpt. Excerpts will always be truncated because they are, well, excerpts.
You can either make your excerpts longer (see under “Display post excerpt”) or disable them completely.
Scratch that. Had a second look at your website and indeed titles are being truncated.
Try this:
- Tick the “Shorten title” option, then save changes.
- Untick the “Shorten title” option again, then save changes one more time.
Please report back your results.