For multi-part compositions Roon displays part names instead of track names, according to it’s configuration either from Roon’s metadata or your file tags. In such cases Roon usually uses it’s own metadata if there is no file data available when set to “Prefer File”. If you want to see the track titles instead, you have to tell so (“Disable Multi-Part Compositions on this Album”). As the option indicates, you have to explicitly do so for every album where that should be the case. If done then Roon will disable the display of work/part names and display track names instead, again according to it’s configuration, either from Roon’s metadata or your file tags. See also:
As there is no global option for disabling the display of work/part names right now, you might want to open a feature request for it.