Titlists were also made frequently from "Ipe" also known as brazilian walnut. Some other names used were ( Brazil), Amapa, cortex, Guayacan, Flor Amarillo, Greenheart, Madera negra, Tahuari, Lapacho negro. Ipe has a number of trade names: Ironwood™, Pau Lope™ & Brazilian Walnut... these are commercial names given to Ipe lumber by large Brazilian exporters.
note: some of these trade names for ipe lumber, include not only Ipe wood, but also a number of other similar species like cumaru (Dipterix odorata) and jarrah (Eucalyptus marginata). Info off of the WEB for wood sources searching for "Ipe wood".
John