Does Eikon Data API provide capabilities to retrieve research report titles and research report files?
I am afraid not, Eikon Data API cannot retrieve download file / app specific data.
get_data() on Eikon Data API can retrieve content that are available in TR.<xxx> fields and all the realtime fields(fields on Quote application)
RDP contains a couple of services that will allow you to retrieve research report details.
The /data/research/v1/documents RDP endpoint provides the ability to request a research document (file) using a Document ID.
The /message-services/v1/research/subscriptions RDP endpoint is an AWS queue-based notification service that will deliver research subscription notifications. This notification service will deliver a number of metadata details around the research report including the Document ID, research headline, synopsis, authors, etc.
Both of the above services require a Research ID in order for you to request information.
The Refinitiv Data Libraries are designed to access content from the RDP. However, depending on how you prefer to access and what language will determine suitablility.