NOTE: This concerns WARC uploads.

$ ia upload <identifier> file1 file2 --metadata="title:foo"

Syntax: --metadata="blah:arg" (including quotes)

List of field names I can use with above syntax:

mediatype:(texts|web)
description:
subject:
collection:(opensource_media|opensource)
title:

I'd try:

$ ia upload warc-www.warren.k12.ky.us--techweb www.warren.k12.ky.us--techweb-00000.warc.gz  www.warren.k12.ky.us--techweb.cdx www.warren.k12.ky.us--techweb-meta.warc.gz --metadata="title:WARC - www.warren.k12.ky.us" --metadata="mediatype:web" --metadata="description: WARC archive of http://www.warren.k12.ky.us/." --metadata="subject:dec3199" --metadata="subject:warc" --metadata="subject:warc.gz" --metadata="subject:warcarchives" --metadata="collection:opensource_media"

or simply:

$ ia upload warc-www.warren.k12.ky.us--techweb www.warren.k12.ky.us--techweb-00000.warc.gz  www.warren.k12.ky.us--techweb.cdx www.warren.k12.ky.us--techweb-meta.warc.gz --metadata="title:WARC - www.warren.k12.ky.us" --metadata="mediatype:web" --metadata="subject:warcarchives"