Tech materials are a type of resource. They are found among the various sapient species of Andromeda.
In the table below, the total required amount for each tech material listed is the amount of that resource to develop one copy of every Tier for all of the items listed. This gives a general guideline of how much a tech material is used and how much you may need. If you develop additional copies then of course the requirement will be higher than the listed amount. Refer to each individual resource page for details on the specific items that can be developed.