Navigate to Catalog > Releases and search for the album you want to export, or to export an entire label navigate to Catalog > Labels
Choose the Metadata export icon…

Choose the export format you want (see below)
Press export
Once the export has finished being generated, download the .csv file
Tracks metadata can be exported via various groupings, for example…
A single release (album)
A label (all the albums assigned to that label)
Your entire catalog

Formats available for export include…
.txt file (tab separated values)