Ducommun Inc. said Tuesday it acquired competitor DynaBil Industries Inc., which makes titanium and aluminum structural components for commercial and military aerospace craft, for $46.5 million.

Coxsackie, NY-based DynaBil supplies parts for military aircraft made by companies that include Sikorsky Aircraft Corp., which makes Black Hawk and Seahawk military helicopters. DynaBil, which will become part of subsidiary Ducommun AeroStructures Inc., also supplies parts to Boeing Co.’s 787 “Dreamliner” airplane project.

DynaBil is privately held, with 2008 sales expected at $43 million, said Carson-based Ducommun, which also makes aluminum parts for the military and commercial aerospace industries.

“DynaBil expands our customer base and our content on key programs including the Sikorsky Blackhawk helicopter and Boeing 787 aircraft,” said Chief Executive Joseph Berenato in a statement. “We intend to pursue larger, value-added assembly contracts as a result of our increased assembly capabilities and customer base.”

Ducommun shares were up 65 cents, or 4 percent, to $17.67 in morning trading on the New York Stock Exchange.