porosity 36 the inventor has determined that the inability to eliminate the centerline porosity results from the pronounced columnar grain structure 34 produced by solidification this columnar grain structure produces surface connected porosity which in turn prevents the closure of the centerline porosity 36 during the hot isostatic pressing the present approach reduces the surface connected porosity so that the hot isostatic pressing is more successful in removing the interior porosity according to the present approach as illustrated in fig3 and fig4 a mold 40 into which the turbine blade 20 or other article is cast is furnished numeral 50 with an internal facecoating of an inoculant operable to nucleate grains during solidification of a molten metal which upon solidification forms a gamma titanium alumirnide material as shown in fig4 the mold 40 has an inner surface 42 that defines the shape of the article the inner surface 42 has a thin facecoating 44 of the inoculant thereon the thickness of the facecoating 44 is normally quite small on the order of 0 001 inch and is exaggerated in fig4 so as to be visible the facecoating 44 can be applied to the inner surface 42 in any operable manner and the manner of application is typically determined by the nature of the mold most gamma titanium aluminides are cast using investment casting in that approach as modified according to the present invention a 34 fugitive 34 male model of the article is prepared the male model is made.