I created a document library with a few columns. One of them is a custom column named 'document title'. The search center seems to show the results as: document name, description and link. How to change the document name to show document title?
Follow this tutorial which shows, how to customize search result https://blogs.technet.microsoft.com/tothesharepoint/2013/09/06/how-to-display-values-from-custom-managed-properties-in-search-results-option-1/