The High-Luminosity (HL) phase of the Large Hadron Collider (LHC) at CERN will offer a great opportunity to consolidate and expand the LHC physics program, but it will also present several experimental challenges. One of the major ones is the increase in the number of pile-up interactions in each bunch crossing. The High Granularity Timing Detector (HGTD) is a Phase-II ATLAS upgrade that will use timing information to reduce the impact of pile-up, covering the pseudorapidity region between 2.4 and 4.0 and providing a per-track time resolution of 30 ps and 50 ps respectively at the beginning and at the end of the HL-LHC operation.