Titus Engraving, Plainville, Mass., has purchased Triad Inc., dba Royal Findings. Founded in 1969, Triad holds the patent for Sparkie, the mini-fusion welder; produces Flash, a temporary tack welder; provides fusion welding services; and manufactures R.F. seals for medical and military applications. Titus, founded in 1980, will add these capabilities to its existing array of services including stone setting, hand and computer engraving, faceting, and engine turning.